TY  - CONF
AU  - Radojković, Aleksandar
AU  - Luković Golić, Danijela
AU  - Jović Orsini, Nataša
AU  - Nikolić, Nenad
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2460
PB  - Српско кристалографско друштво, Ђушина 7, 11000 Београд
C3  - XXVIII Конференција Српског кристалографског друштва, Чачак 2023; 28th Conference of the Serbian Crystallographic Society
T1  - Структурна својства керамике BiFeO3 допиране лантаном и цирконијумом; Structural properties of BiFeO3 ceramics doped with lantanum and zirconium
SP  - 52, 53
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2460
ER  - 

@conference{
author = "Radojković, Aleksandar and Luković Golić, Danijela and Jović Orsini, Nataša and Nikolić, Nenad",
year = "2023",
publisher = "Српско кристалографско друштво, Ђушина 7, 11000 Београд",
journal = "XXVIII Конференција Српског кристалографског друштва, Чачак 2023; 28th Conference of the Serbian Crystallographic Society",
title = "Структурна својства керамике BiFeO3 допиране лантаном и цирконијумом; Structural properties of BiFeO3 ceramics doped with lantanum and zirconium",
pages = "52, 53",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2460"
}

Radojković, A., Luković Golić, D., Jović Orsini, N.,& Nikolić, N.. (2023). Структурна својства керамике BiFeO3 допиране лантаном и цирконијумом; Structural properties of BiFeO3 ceramics doped with lantanum and zirconium. in XXVIII Конференција Српског кристалографског друштва, Чачак 2023; 28th Conference of the Serbian Crystallographic Society
Српско кристалографско друштво, Ђушина 7, 11000 Београд., 52, 53.
https://hdl.handle.net/21.15107/rcub_rimsi_2460

Radojković A, Luković Golić D, Jović Orsini N, Nikolić N. Структурна својства керамике BiFeO3 допиране лантаном и цирконијумом; Structural properties of BiFeO3 ceramics doped with lantanum and zirconium. in XXVIII Конференција Српског кристалографског друштва, Чачак 2023; 28th Conference of the Serbian Crystallographic Society. 2023;:52, 53.
https://hdl.handle.net/21.15107/rcub_rimsi_2460 .

Radojković, Aleksandar, Luković Golić, Danijela, Jović Orsini, Nataša, Nikolić, Nenad, "Структурна својства керамике BiFeO3 допиране лантаном и цирконијумом; Structural properties of BiFeO3 ceramics doped with lantanum and zirconium" in XXVIII Конференција Српског кристалографског друштва, Чачак 2023; 28th Conference of the Serbian Crystallographic Society (2023):52, 53,
https://hdl.handle.net/21.15107/rcub_rimsi_2460 .

TY  - CONF
AU  - Radojković, Aleksandar
AU  - Luković Golić, Danijela
AU  - JOVIĆ ORSINI, Nataša
AU  - Ćirković, Jovana
AU  - Nikolić, Nenad
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2386
AB  - In this study, we tried various cation substitutions at Bi-site (La3+, Eu3+) and Fesite (Nb5+
, Zr4+
) to explore their possible synergism and improvement of the
ferroelectric properties of bismuth ferrite. The cations with higher valence ought to
suppress the formation of structural defects during syntheses, such as oxygen and
bismuth vacancies. These defects are responsible for high leakage currents and low
breakdown voltages characteristic of pure BiFeO3. On the other hand, rare earth
cations at the Bi-site usually enable densification of the ceramics at a broader range
of temperatures, preventing bismuth loss and formation of defects and secondary
phases during sintering. However, dopant concentrations above 10–15 mol% may
give rise to a transition from polar, rhombohedral (R3c) to non-polar, orthorhombic
(Pnma) symmetry.
Thus, we synthesized pure and selected compositions doped BiFeO3 by a hydroevaporation method and determined the optimal calcination temperature by thermal
analyses of the precursor powders. Then we characterized ceramics samples using
X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and
polarization techniques. Although only 1 mol% Nb5+ decreased the leakage current,
it surprisingly deteriorated the ferroelectric properties of BiFeO3. Similar effect
exhibited the samples containing Zr4+ that showed no improvement compared with
undoped bismuth ferrite. On the contrary, La3+ and Eu3+ (incorporated at the Bi-site)
improved the ferroelectric properties as their concentrations increased, whereby the
samples doped with 15 mol% La exhibited higher remnant electric polarizations at
observed electric fields. The highest remnant electric polarization of 31.9 µC/cm2
at 150 kV/cm, was measured for Bi0.85La0.15Fe0.998Zr0.002O3, indicating the synergetic
effect of La3+ and Zr4+, which is limited to low Zr4+ concentrations.
PB  - Društvo za keramičke materijale Srbije
C3  - 7th Conference of the Serbian Ceramic Society
T1  - TUNING OF FERROELECTRIC PROPERTIES OF BiFeO3 CERAMICS BY CATION SUBSTITUTIONS AT Bi-SITE AND Fe-SITE
SP  - 79
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2386
ER  - 

@conference{
author = "Radojković, Aleksandar and Luković Golić, Danijela and JOVIĆ ORSINI, Nataša and Ćirković, Jovana and Nikolić, Nenad and Branković, Zorica and Branković, Goran",
year = "2023",
abstract = "In this study, we tried various cation substitutions at Bi-site (La3+, Eu3+) and Fesite (Nb5+
, Zr4+
) to explore their possible synergism and improvement of the
ferroelectric properties of bismuth ferrite. The cations with higher valence ought to
suppress the formation of structural defects during syntheses, such as oxygen and
bismuth vacancies. These defects are responsible for high leakage currents and low
breakdown voltages characteristic of pure BiFeO3. On the other hand, rare earth
cations at the Bi-site usually enable densification of the ceramics at a broader range
of temperatures, preventing bismuth loss and formation of defects and secondary
phases during sintering. However, dopant concentrations above 10–15 mol% may
give rise to a transition from polar, rhombohedral (R3c) to non-polar, orthorhombic
(Pnma) symmetry.
Thus, we synthesized pure and selected compositions doped BiFeO3 by a hydroevaporation method and determined the optimal calcination temperature by thermal
analyses of the precursor powders. Then we characterized ceramics samples using
X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and
polarization techniques. Although only 1 mol% Nb5+ decreased the leakage current,
it surprisingly deteriorated the ferroelectric properties of BiFeO3. Similar effect
exhibited the samples containing Zr4+ that showed no improvement compared with
undoped bismuth ferrite. On the contrary, La3+ and Eu3+ (incorporated at the Bi-site)
improved the ferroelectric properties as their concentrations increased, whereby the
samples doped with 15 mol% La exhibited higher remnant electric polarizations at
observed electric fields. The highest remnant electric polarization of 31.9 µC/cm2
at 150 kV/cm, was measured for Bi0.85La0.15Fe0.998Zr0.002O3, indicating the synergetic
effect of La3+ and Zr4+, which is limited to low Zr4+ concentrations.",
publisher = "Društvo za keramičke materijale Srbije",
journal = "7th Conference of the Serbian Ceramic Society",
title = "TUNING OF FERROELECTRIC PROPERTIES OF BiFeO3 CERAMICS BY CATION SUBSTITUTIONS AT Bi-SITE AND Fe-SITE",
pages = "79",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2386"
}

Radojković, A., Luković Golić, D., JOVIĆ ORSINI, N., Ćirković, J., Nikolić, N., Branković, Z.,& Branković, G.. (2023). TUNING OF FERROELECTRIC PROPERTIES OF BiFeO3 CERAMICS BY CATION SUBSTITUTIONS AT Bi-SITE AND Fe-SITE. in 7th Conference of the Serbian Ceramic Society
Društvo za keramičke materijale Srbije., 79.
https://hdl.handle.net/21.15107/rcub_rimsi_2386

Radojković A, Luković Golić D, JOVIĆ ORSINI N, Ćirković J, Nikolić N, Branković Z, Branković G. TUNING OF FERROELECTRIC PROPERTIES OF BiFeO3 CERAMICS BY CATION SUBSTITUTIONS AT Bi-SITE AND Fe-SITE. in 7th Conference of the Serbian Ceramic Society. 2023;:79.
https://hdl.handle.net/21.15107/rcub_rimsi_2386 .

Radojković, Aleksandar, Luković Golić, Danijela, JOVIĆ ORSINI, Nataša, Ćirković, Jovana, Nikolić, Nenad, Branković, Zorica, Branković, Goran, "TUNING OF FERROELECTRIC PROPERTIES OF BiFeO3 CERAMICS BY CATION SUBSTITUTIONS AT Bi-SITE AND Fe-SITE" in 7th Conference of the Serbian Ceramic Society (2023):79,
https://hdl.handle.net/21.15107/rcub_rimsi_2386 .

TY  - CONF
AU  - Luković Golić, Danijela
AU  - Radojković, Aleksandar
AU  - Jović Orsini, Nataša
AU  - Dapčević, Aleksandra
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2320
AB  - Bismuth ferrite is a unique multiferroic material that has a ferroelectric and antiferromagnetic order at room temperature. The rhombohedrally (R3c) distorted  BiFeO3 perovskite structure is a result of relative cation displacement along [111] axis of the cubic perovskite structure and relative rotation of two oxygen octahedra in opposite directions around [111] axis [1]. The partial substitution of Bi3+ with rare-earth ions can affect the magnitude of lattice distortion and thus the value of electric polarization. The presence of undesirable secondary phases (Bi2Fe4O9 and Bi25FeO39) and structural point defects (oxygen and bismuth vacancies) in pure BiFeO3 lead to a high leakage current, which deteriorates its ferroelectric properties. Doping with rare-earth elements with large ionic radii is found to reduce the number of the structural defects and thus improve ferroelectric properties [2].
	The influence of partial substitution of Bi3+ with La3+ and/or Eu3+ on ferroelectric properties of BiFeO3 ceramics was investigated. The Bi1-(x+y)LaxEuyFeO3 (x = 0, 0.025 0.05, 0.10; y = 0, 0.025, 0.05, 0.10) powders were synthesized by hydro-evaporation method, uniaxially pressed at 9 t/cm2 and sintered at 835 °C for 3 h. All the ceramic samples showed a rhombohedral structure, without presence of the secondary phases. Their morphology indicated the complete sintering under the given conditions. The grain size and grain shapes differed more depending on the dopant type and amount. The introduction of La3+ and/or Eu3+ at the site of Bi3+ led to such distortions within the rhombohedral lattice that resulted in much greater remnant electric polarization (Pr) in comparison with the undoped sample. The Bi1-(x+y)LaxEuyFeO3 ceramic samples with x+y = 0.10 showed approximately quadratic polarization vs. electric field P(E) hysteresis curves as well as significantly high values of pure ferroelectric polarization Pr, in large electric fields (100 – 140) kV/cm. The leakage currents of La3+/Eu3+-doped samples are mostly reduced, especially those doped only with Eu3+.
PB  - Institut za multidisciplinarna istraživanja, Kneza Višeslava 1, 11000 Belgrade, Serbia
C3  - 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022, Belgrade, Serbia 6CSCS-2022
T1  - The improvement of ferroelectric properties of BiFeO3 ceramics by doping with La3+ and Eu3+
SP  - 77
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2320
ER  - 

@conference{
author = "Luković Golić, Danijela and Radojković, Aleksandar and Jović Orsini, Nataša and Dapčević, Aleksandra and Branković, Goran and Branković, Zorica",
year = "2022",
abstract = "Bismuth ferrite is a unique multiferroic material that has a ferroelectric and antiferromagnetic order at room temperature. The rhombohedrally (R3c) distorted  BiFeO3 perovskite structure is a result of relative cation displacement along [111] axis of the cubic perovskite structure and relative rotation of two oxygen octahedra in opposite directions around [111] axis [1]. The partial substitution of Bi3+ with rare-earth ions can affect the magnitude of lattice distortion and thus the value of electric polarization. The presence of undesirable secondary phases (Bi2Fe4O9 and Bi25FeO39) and structural point defects (oxygen and bismuth vacancies) in pure BiFeO3 lead to a high leakage current, which deteriorates its ferroelectric properties. Doping with rare-earth elements with large ionic radii is found to reduce the number of the structural defects and thus improve ferroelectric properties [2].
	The influence of partial substitution of Bi3+ with La3+ and/or Eu3+ on ferroelectric properties of BiFeO3 ceramics was investigated. The Bi1-(x+y)LaxEuyFeO3 (x = 0, 0.025 0.05, 0.10; y = 0, 0.025, 0.05, 0.10) powders were synthesized by hydro-evaporation method, uniaxially pressed at 9 t/cm2 and sintered at 835 °C for 3 h. All the ceramic samples showed a rhombohedral structure, without presence of the secondary phases. Their morphology indicated the complete sintering under the given conditions. The grain size and grain shapes differed more depending on the dopant type and amount. The introduction of La3+ and/or Eu3+ at the site of Bi3+ led to such distortions within the rhombohedral lattice that resulted in much greater remnant electric polarization (Pr) in comparison with the undoped sample. The Bi1-(x+y)LaxEuyFeO3 ceramic samples with x+y = 0.10 showed approximately quadratic polarization vs. electric field P(E) hysteresis curves as well as significantly high values of pure ferroelectric polarization Pr, in large electric fields (100 – 140) kV/cm. The leakage currents of La3+/Eu3+-doped samples are mostly reduced, especially those doped only with Eu3+.",
publisher = "Institut za multidisciplinarna istraživanja, Kneza Višeslava 1, 11000 Belgrade, Serbia",
journal = "6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022, Belgrade, Serbia 6CSCS-2022",
title = "The improvement of ferroelectric properties of BiFeO3 ceramics by doping with La3+ and Eu3+",
pages = "77",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2320"
}

Luković Golić, D., Radojković, A., Jović Orsini, N., Dapčević, A., Branković, G.,& Branković, Z.. (2022). The improvement of ferroelectric properties of BiFeO3 ceramics by doping with La3+ and Eu3+. in 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022, Belgrade, Serbia 6CSCS-2022
Institut za multidisciplinarna istraživanja, Kneza Višeslava 1, 11000 Belgrade, Serbia., 77.
https://hdl.handle.net/21.15107/rcub_rimsi_2320

Luković Golić D, Radojković A, Jović Orsini N, Dapčević A, Branković G, Branković Z. The improvement of ferroelectric properties of BiFeO3 ceramics by doping with La3+ and Eu3+. in 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022, Belgrade, Serbia 6CSCS-2022. 2022;:77.
https://hdl.handle.net/21.15107/rcub_rimsi_2320 .

Luković Golić, Danijela, Radojković, Aleksandar, Jović Orsini, Nataša, Dapčević, Aleksandra, Branković, Goran, Branković, Zorica, "The improvement of ferroelectric properties of BiFeO3 ceramics by doping with La3+ and Eu3+" in 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022, Belgrade, Serbia 6CSCS-2022 (2022):77,
https://hdl.handle.net/21.15107/rcub_rimsi_2320 .

TY  - CONF
AU  - Zemljak, Olivera
AU  - Luković Golić, Danijela
AU  - Počuča-Nešić, Milica
AU  - Dapčević, Aleksandra
AU  - Pajić, Damir
AU  - Šenjug, Pavla
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2211
AB  - Hexagonal (P63cm) yttrium manganite, YMnO3, is a multiferroic material with
ferroelectric transition at TC ≈ 900 K and antiferromagnetic transition at TN ≈ 70 K. Multiferroic behavior attracts a lot of attention because of its potential for
various applications. The application possibilities are limited by large
microcracking and microporosity of YMnO3 ceramics.
In this work, the influence of Ti-doping on structural, ferroelectric and magnetic
properties of YMnO3 ceramics was investigated. YMn1–xTixO3+δ (x = 0, 0.04, 0.08,
0.10, 0.15, 0.20) powders were prepared using sol-gel, polymerization complex
method from citrate precursors, which were then calcinated at 900 °C for 4 h. The
ceramic samples were obtained after sintering for 2 h at: 1400 °C for YMnO3,
YMn0.96Ti0.04O3+δ, YMn0.92Ti0.08O3+δ and YMn0.90Ti0.10O3+δ; 1450 C for
YMn0.85Ti0.15O3+δ; 1470 °C for YMn0.80Ti0.20O3+δ. X-ray diffraction (XRD),
transmission and scanning electron microscopy (TEM and SEM) were used for
structural and microstructural analysis of samples. Ferroelectric measurements of
P(E) loops and leakage currents, and magnetic measurements of zero field cooled
(ZFC) and field cooled (FC) M(T) curves, as well as M(H) curves, were enabled
multiferroic characterization of ceramic samples.
The samples x = 0 and 0.04 are crystallized in a single phased hexagonal
structure, (P63cm), the samples x = 0.08 and 0.10 exhibited the presence of both
hexagonal phase and rhombohedral phase (R3c), and the samples x = 0.15 and 0.20
are crystallized in rhombohedral 1×1×3 superstructure. Ti-doped YMnO3 ceramic
samples showed reduced density of microcracks, and inter- and intragranular pores,
and large increase in relative density (greater than 90 %) for YMn1–xTixO3+δ (x =
0.10, 0.15 and 0.20) samples. Leakage currents for most of doped samples were
lower than leakage current of undoped sample, but the ferroelectric response was not
significantly improved. Doping of YMnO3 with nonmagnetic Ti4+ led to suppression
of antiferromagnetic ordering visible through decrease of the Néel temperature and
Weiss parameter and the appearance of weak ferromagnetism.
PB  - Institut za multicisciplinarna istrživanja, Belgrade, Serbia
C3  - 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022 Belgrade, Serbia 6CSCS-2022
T1  - The influence of Ti-doping on structural and multiferroic properties of yttrium manganite ceramics
SP  - 74
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2211
ER  - 

@conference{
author = "Zemljak, Olivera and Luković Golić, Danijela and Počuča-Nešić, Milica and Dapčević, Aleksandra and Pajić, Damir and Šenjug, Pavla and Branković, Goran and Branković, Zorica",
year = "2022",
abstract = "Hexagonal (P63cm) yttrium manganite, YMnO3, is a multiferroic material with
ferroelectric transition at TC ≈ 900 K and antiferromagnetic transition at TN ≈ 70 K. Multiferroic behavior attracts a lot of attention because of its potential for
various applications. The application possibilities are limited by large
microcracking and microporosity of YMnO3 ceramics.
In this work, the influence of Ti-doping on structural, ferroelectric and magnetic
properties of YMnO3 ceramics was investigated. YMn1–xTixO3+δ (x = 0, 0.04, 0.08,
0.10, 0.15, 0.20) powders were prepared using sol-gel, polymerization complex
method from citrate precursors, which were then calcinated at 900 °C for 4 h. The
ceramic samples were obtained after sintering for 2 h at: 1400 °C for YMnO3,
YMn0.96Ti0.04O3+δ, YMn0.92Ti0.08O3+δ and YMn0.90Ti0.10O3+δ; 1450 C for
YMn0.85Ti0.15O3+δ; 1470 °C for YMn0.80Ti0.20O3+δ. X-ray diffraction (XRD),
transmission and scanning electron microscopy (TEM and SEM) were used for
structural and microstructural analysis of samples. Ferroelectric measurements of
P(E) loops and leakage currents, and magnetic measurements of zero field cooled
(ZFC) and field cooled (FC) M(T) curves, as well as M(H) curves, were enabled
multiferroic characterization of ceramic samples.
The samples x = 0 and 0.04 are crystallized in a single phased hexagonal
structure, (P63cm), the samples x = 0.08 and 0.10 exhibited the presence of both
hexagonal phase and rhombohedral phase (R3c), and the samples x = 0.15 and 0.20
are crystallized in rhombohedral 1×1×3 superstructure. Ti-doped YMnO3 ceramic
samples showed reduced density of microcracks, and inter- and intragranular pores,
and large increase in relative density (greater than 90 %) for YMn1–xTixO3+δ (x =
0.10, 0.15 and 0.20) samples. Leakage currents for most of doped samples were
lower than leakage current of undoped sample, but the ferroelectric response was not
significantly improved. Doping of YMnO3 with nonmagnetic Ti4+ led to suppression
of antiferromagnetic ordering visible through decrease of the Néel temperature and
Weiss parameter and the appearance of weak ferromagnetism.",
publisher = "Institut za multicisciplinarna istrživanja, Belgrade, Serbia",
journal = "6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022 Belgrade, Serbia 6CSCS-2022",
title = "The influence of Ti-doping on structural and multiferroic properties of yttrium manganite ceramics",
pages = "74",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2211"
}

Zemljak, O., Luković Golić, D., Počuča-Nešić, M., Dapčević, A., Pajić, D., Šenjug, P., Branković, G.,& Branković, Z.. (2022). The influence of Ti-doping on structural and multiferroic properties of yttrium manganite ceramics. in 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022 Belgrade, Serbia 6CSCS-2022
Institut za multicisciplinarna istrživanja, Belgrade, Serbia., 74.
https://hdl.handle.net/21.15107/rcub_rimsi_2211

Zemljak O, Luković Golić D, Počuča-Nešić M, Dapčević A, Pajić D, Šenjug P, Branković G, Branković Z. The influence of Ti-doping on structural and multiferroic properties of yttrium manganite ceramics. in 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022 Belgrade, Serbia 6CSCS-2022. 2022;:74.
https://hdl.handle.net/21.15107/rcub_rimsi_2211 .

Zemljak, Olivera, Luković Golić, Danijela, Počuča-Nešić, Milica, Dapčević, Aleksandra, Pajić, Damir, Šenjug, Pavla, Branković, Goran, Branković, Zorica, "The influence of Ti-doping on structural and multiferroic properties of yttrium manganite ceramics" in 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022 Belgrade, Serbia 6CSCS-2022 (2022):74,
https://hdl.handle.net/21.15107/rcub_rimsi_2211 .

TY  - JOUR
AU  - Milošević, Olivera
AU  - Luković Golić, Danijela
AU  - Počuča-Nešić, Milica
AU  - Dapčević, Aleksandra
AU  - Šenjug, Pavla
AU  - Pajić, Damir
AU  - Radošević, Tina
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1750
AB  - Yttrium manganite, YMnO3, was doped with different concentrations of titanium (x = 0, 0.04, 0.08, 0.10, 0.15, 0.20) in order to improve the microstructural and multiferroic properties. The powders were prepared using sol-gel polymerization complex method from citrate precursors. Depending on the titanium concentration, the hexagonal structure and/or the rhombohedral superstructure are present in the sintered samples. The YMn1–xTixO3+δ (x = 0.10, 0.15, 0.20) ceramic samples showed significantly reduced density of microcracks, and of inter- and intragranular pores, and relative densities greater than 90 %. The structural parameters for YMn1–xTixO3+δ (x = 0, 0.10, 0.15) were correlated with the results of magnetic and ferroelectric measurements. The most of titanium-doped samples showed a reduction of the leakage current density in comparison with undoped YMnO3, and their ferroelectric responses were slightly improved. The modifications in structural arrangement resulted in partial suppression of ideal antiferromagnetic ordering visible through decrease of the Néel temperature and Weiss parameter, as well as the appearance of weak ferromagnetism and increase of magnetization (especially, in samples x = 0.08, 0.10, 0.15). These changes in physical quantities most likely originated from incorporation of the uncompensated magnetic moments and possible spin canting induced by enhanced symmetry break of the superexchange bridges.
PB  - Springer
T2  - Journal of Sol-Gel Science and Technology
T1  - Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties
EP  - 819
IS  - 3
SP  - 807
VL  - 103
DO  - 10.1007/s10971-022-05872-3
ER  - 

@article{
author = "Milošević, Olivera and Luković Golić, Danijela and Počuča-Nešić, Milica and Dapčević, Aleksandra and Šenjug, Pavla and Pajić, Damir and Radošević, Tina and Branković, Goran and Branković, Zorica",
year = "2022",
abstract = "Yttrium manganite, YMnO3, was doped with different concentrations of titanium (x = 0, 0.04, 0.08, 0.10, 0.15, 0.20) in order to improve the microstructural and multiferroic properties. The powders were prepared using sol-gel polymerization complex method from citrate precursors. Depending on the titanium concentration, the hexagonal structure and/or the rhombohedral superstructure are present in the sintered samples. The YMn1–xTixO3+δ (x = 0.10, 0.15, 0.20) ceramic samples showed significantly reduced density of microcracks, and of inter- and intragranular pores, and relative densities greater than 90 %. The structural parameters for YMn1–xTixO3+δ (x = 0, 0.10, 0.15) were correlated with the results of magnetic and ferroelectric measurements. The most of titanium-doped samples showed a reduction of the leakage current density in comparison with undoped YMnO3, and their ferroelectric responses were slightly improved. The modifications in structural arrangement resulted in partial suppression of ideal antiferromagnetic ordering visible through decrease of the Néel temperature and Weiss parameter, as well as the appearance of weak ferromagnetism and increase of magnetization (especially, in samples x = 0.08, 0.10, 0.15). These changes in physical quantities most likely originated from incorporation of the uncompensated magnetic moments and possible spin canting induced by enhanced symmetry break of the superexchange bridges.",
publisher = "Springer",
journal = "Journal of Sol-Gel Science and Technology",
title = "Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties",
pages = "819-807",
number = "3",
volume = "103",
doi = "10.1007/s10971-022-05872-3"
}

Milošević, O., Luković Golić, D., Počuča-Nešić, M., Dapčević, A., Šenjug, P., Pajić, D., Radošević, T., Branković, G.,& Branković, Z.. (2022). Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties. in Journal of Sol-Gel Science and Technology
Springer., 103(3), 807-819.
https://doi.org/10.1007/s10971-022-05872-3

Milošević O, Luković Golić D, Počuča-Nešić M, Dapčević A, Šenjug P, Pajić D, Radošević T, Branković G, Branković Z. Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties. in Journal of Sol-Gel Science and Technology. 2022;103(3):807-819.
doi:10.1007/s10971-022-05872-3 .

Milošević, Olivera, Luković Golić, Danijela, Počuča-Nešić, Milica, Dapčević, Aleksandra, Šenjug, Pavla, Pajić, Damir, Radošević, Tina, Branković, Goran, Branković, Zorica, "Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties" in Journal of Sol-Gel Science and Technology, 103, no. 3 (2022):807-819,
https://doi.org/10.1007/s10971-022-05872-3 . .

TY  - CONF
AU  - Radojković, Aleksandar
AU  - Luković Golić, Danijela
AU  - JOVIĆ ORSINI, Nataša
AU  - Ćirković, Jovana
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1738
AB  - BiFeO3 is one of the few multiferroic perovskites that exhibits magnetic and ferroelectric properties
at room temperature. However, it is also distinguished by high leakage current, low remnant electric
and magnetic polarization, and high electric coercive field. These features keep it away from any practical
use in electronics. Therefore, many attempts have been made to improve the properties of BiFeO3 by
Bi- or Fe-site doping or by both. Previous investigations suggest that doping with Nbat Fe-site can
positively affect the magnetic behavior of BiFeO3 and decrease the leakage current.
In this study, various cation substitutions at Bi-site (La3+, Eu3+) and Fe-site (Nb5+, Zr4+) were examined
to investigate their possible synergism and benefit for the ferroelectric properties. The role of the cations
with higher valence is to suppress the formation of structural defects during synthesis, such as oxygen
and bismuth vacancies. These defects are responsible for high leakage currents and, consequently, low
breakdown voltages characteristic of the pure BiFeO3. On the other hand, rare earth cations at the Bisite
usually enable densification of the ceramics in a wider range of temperatures, preventing bismuth
loss and forming defects and secondary phases during sintering. However, do pant concentrations above
10–15mol% may give rise to transition from polar, rhombohedral (R3c) to non-polar, orthorhombic
(Pnma) symmetry.
The carefully selected compositions of doped BiFeO3 were synthesized by a simple hydro-evaporation
method. The ceramics samples were characterized using X-ray diffraction (XRD) analysis, scanning
electron microscopy (SEM), and polarization techniques, including leakage current measurements.
Although the introduction of Nb5+or Zr4+decreased the leakage current, they surprisingly deteriorated
the ferroelectric properties even at concentrations as low as 1 mol%. This effect was more pronounced for
the samples containing Nb. On the contrary, both La3+ and Eu3+ (incorporated at the Bi-site) improved
the ferroelectric properties as their concentrations increased. The La-doped samples exhibited higher
remnant electric polarizations at observed electric fields. The highest remnant electric polarization of31.9
μC/cm2at 150 kV/cm was measured for Bi0.85La0.15Fe0.998Zr0.002O3, indicating the synergetic
effect of La3+ and Zr4+, which is limited to very low Zr4+concentrations.
PB  - Linkin Science Pvt. Ltd
C3  - 5TH EDITION OF NANOTECHNOLOGY, NANOMEDICINE & OPTICS PHOTONICS HYBRID CONFERENCE
T1  - Ferroelectric properties of BiFeO3 ceramics with cation substitutions at Bi-site (La3+, Eu3+) and Fe-site (Nb5+, Zr4+)
SP  - 10
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1738
ER  - 

@conference{
author = "Radojković, Aleksandar and Luković Golić, Danijela and JOVIĆ ORSINI, Nataša and Ćirković, Jovana and Branković, Zorica and Branković, Goran",
year = "2022",
abstract = "BiFeO3 is one of the few multiferroic perovskites that exhibits magnetic and ferroelectric properties
at room temperature. However, it is also distinguished by high leakage current, low remnant electric
and magnetic polarization, and high electric coercive field. These features keep it away from any practical
use in electronics. Therefore, many attempts have been made to improve the properties of BiFeO3 by
Bi- or Fe-site doping or by both. Previous investigations suggest that doping with Nbat Fe-site can
positively affect the magnetic behavior of BiFeO3 and decrease the leakage current.
In this study, various cation substitutions at Bi-site (La3+, Eu3+) and Fe-site (Nb5+, Zr4+) were examined
to investigate their possible synergism and benefit for the ferroelectric properties. The role of the cations
with higher valence is to suppress the formation of structural defects during synthesis, such as oxygen
and bismuth vacancies. These defects are responsible for high leakage currents and, consequently, low
breakdown voltages characteristic of the pure BiFeO3. On the other hand, rare earth cations at the Bisite
usually enable densification of the ceramics in a wider range of temperatures, preventing bismuth
loss and forming defects and secondary phases during sintering. However, do pant concentrations above
10–15mol% may give rise to transition from polar, rhombohedral (R3c) to non-polar, orthorhombic
(Pnma) symmetry.
The carefully selected compositions of doped BiFeO3 were synthesized by a simple hydro-evaporation
method. The ceramics samples were characterized using X-ray diffraction (XRD) analysis, scanning
electron microscopy (SEM), and polarization techniques, including leakage current measurements.
Although the introduction of Nb5+or Zr4+decreased the leakage current, they surprisingly deteriorated
the ferroelectric properties even at concentrations as low as 1 mol%. This effect was more pronounced for
the samples containing Nb. On the contrary, both La3+ and Eu3+ (incorporated at the Bi-site) improved
the ferroelectric properties as their concentrations increased. The La-doped samples exhibited higher
remnant electric polarizations at observed electric fields. The highest remnant electric polarization of31.9
μC/cm2at 150 kV/cm was measured for Bi0.85La0.15Fe0.998Zr0.002O3, indicating the synergetic
effect of La3+ and Zr4+, which is limited to very low Zr4+concentrations.",
publisher = "Linkin Science Pvt. Ltd",
journal = "5TH EDITION OF NANOTECHNOLOGY, NANOMEDICINE & OPTICS PHOTONICS HYBRID CONFERENCE",
title = "Ferroelectric properties of BiFeO3 ceramics with cation substitutions at Bi-site (La3+, Eu3+) and Fe-site (Nb5+, Zr4+)",
pages = "10",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1738"
}

Radojković, A., Luković Golić, D., JOVIĆ ORSINI, N., Ćirković, J., Branković, Z.,& Branković, G.. (2022). Ferroelectric properties of BiFeO3 ceramics with cation substitutions at Bi-site (La3+, Eu3+) and Fe-site (Nb5+, Zr4+). in 5TH EDITION OF NANOTECHNOLOGY, NANOMEDICINE & OPTICS PHOTONICS HYBRID CONFERENCE
Linkin Science Pvt. Ltd., 10.
https://hdl.handle.net/21.15107/rcub_rimsi_1738

Radojković A, Luković Golić D, JOVIĆ ORSINI N, Ćirković J, Branković Z, Branković G. Ferroelectric properties of BiFeO3 ceramics with cation substitutions at Bi-site (La3+, Eu3+) and Fe-site (Nb5+, Zr4+). in 5TH EDITION OF NANOTECHNOLOGY, NANOMEDICINE & OPTICS PHOTONICS HYBRID CONFERENCE. 2022;:10.
https://hdl.handle.net/21.15107/rcub_rimsi_1738 .

Radojković, Aleksandar, Luković Golić, Danijela, JOVIĆ ORSINI, Nataša, Ćirković, Jovana, Branković, Zorica, Branković, Goran, "Ferroelectric properties of BiFeO3 ceramics with cation substitutions at Bi-site (La3+, Eu3+) and Fe-site (Nb5+, Zr4+)" in 5TH EDITION OF NANOTECHNOLOGY, NANOMEDICINE & OPTICS PHOTONICS HYBRID CONFERENCE (2022):10,
https://hdl.handle.net/21.15107/rcub_rimsi_1738 .

TY  - JOUR
AU  - Ćirković, Jovana
AU  - Radojković, Aleksandar
AU  - Luković Golić, Danijela
AU  - Tasić, Nikola
AU  - Cizmic, Mirta
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1437
AB  - This paper presents a systematic study on the photocatalytic activity of single-phase BiFeO3 (BFO) nanopowder, under the simulated solar irradiation in the presence of highly polluting textile dye (Mordant Blue 9). BFO nanopowder was synthesized by the means of the ultrasound-assisted sol-gel route. The structural and morphology analyses confirmed phase-pure crystalline BFO nanopowder with particle size of 70 nm. UV-vis spectroscopy measurements have revealed favorably high absorbance of the visible light with the calculated band-gap value of 2.21 eV. Photodegradation process as a function of different pH values of dye aqueous solution (pH = 1, 6.7 and 12) and irradiation time was investigated and the complete degradation mechanism was revealed. Related photodegradation products were detected by high-performance liquid chromatography equipped with mass spectrometer (HPLC/MS-MS). BFO nanoparticles exhibited higher photocatalytic activity in the basic medium than in neutral and acidic medium. HPLC/MS-MS analysis of the solutions at pH = 1 and pH = 6.7 showed only decolorization process, with no detectable degradation products, while at pH = 12 three different degradation products were observed, and their concentration slightly decreased with time. Reusability test showed that BFO nanoparticles can be used in four successive photodegradation cycles, with no significant activity losses.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Environmental Chemical Engineering
T1  - Visible-light photocatalytic degradation of Mordant Blue 9 by single-phase BiFeO3 nanoparticles
IS  - 1
VL  - 9
DO  - 10.1016/j.jece.2020.104587
ER  - 

@article{
author = "Ćirković, Jovana and Radojković, Aleksandar and Luković Golić, Danijela and Tasić, Nikola and Cizmic, Mirta and Branković, Goran and Branković, Zorica",
year = "2021",
abstract = "This paper presents a systematic study on the photocatalytic activity of single-phase BiFeO3 (BFO) nanopowder, under the simulated solar irradiation in the presence of highly polluting textile dye (Mordant Blue 9). BFO nanopowder was synthesized by the means of the ultrasound-assisted sol-gel route. The structural and morphology analyses confirmed phase-pure crystalline BFO nanopowder with particle size of 70 nm. UV-vis spectroscopy measurements have revealed favorably high absorbance of the visible light with the calculated band-gap value of 2.21 eV. Photodegradation process as a function of different pH values of dye aqueous solution (pH = 1, 6.7 and 12) and irradiation time was investigated and the complete degradation mechanism was revealed. Related photodegradation products were detected by high-performance liquid chromatography equipped with mass spectrometer (HPLC/MS-MS). BFO nanoparticles exhibited higher photocatalytic activity in the basic medium than in neutral and acidic medium. HPLC/MS-MS analysis of the solutions at pH = 1 and pH = 6.7 showed only decolorization process, with no detectable degradation products, while at pH = 12 three different degradation products were observed, and their concentration slightly decreased with time. Reusability test showed that BFO nanoparticles can be used in four successive photodegradation cycles, with no significant activity losses.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Environmental Chemical Engineering",
title = "Visible-light photocatalytic degradation of Mordant Blue 9 by single-phase BiFeO3 nanoparticles",
number = "1",
volume = "9",
doi = "10.1016/j.jece.2020.104587"
}

Ćirković, J., Radojković, A., Luković Golić, D., Tasić, N., Cizmic, M., Branković, G.,& Branković, Z.. (2021). Visible-light photocatalytic degradation of Mordant Blue 9 by single-phase BiFeO3 nanoparticles. in Journal of Environmental Chemical Engineering
Elsevier Sci Ltd, Oxford., 9(1).
https://doi.org/10.1016/j.jece.2020.104587

Ćirković J, Radojković A, Luković Golić D, Tasić N, Cizmic M, Branković G, Branković Z. Visible-light photocatalytic degradation of Mordant Blue 9 by single-phase BiFeO3 nanoparticles. in Journal of Environmental Chemical Engineering. 2021;9(1).
doi:10.1016/j.jece.2020.104587 .

Ćirković, Jovana, Radojković, Aleksandar, Luković Golić, Danijela, Tasić, Nikola, Cizmic, Mirta, Branković, Goran, Branković, Zorica, "Visible-light photocatalytic degradation of Mordant Blue 9 by single-phase BiFeO3 nanoparticles" in Journal of Environmental Chemical Engineering, 9, no. 1 (2021),
https://doi.org/10.1016/j.jece.2020.104587 . .

TY  - JOUR
AU  - Mitrović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Luković Golić, Danijela
AU  - Ribić, Vesna
AU  - Branković, Zorica
AU  - Savić, Slavica M.
AU  - Dapčević, Aleksandra
AU  - Bernik, Slavko
AU  - Podlogar, Matejka
AU  - Kocen, Matej
AU  - Rapljenović, Zeljko
AU  - Ivek, Tomislav
AU  - Lazović, Vladimir
AU  - Dojčinović, Biljana
AU  - Branković, Goran
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1363
AB  - Antimony doped barium-stannate dense ceramic materials were synthesized using spark plasma sintering technique out of mechanically activated precursor powders. The influence of various Sb concentrations (x = 0.00 - 0.10) on properties of BaSn1-xSbxO3 ceramics was investigated. Relative densities of prepared samples were in the range of (79-96) %. TEM analysis revealed the presence of many dislocations in undoped BaSnO3, and their significant reduction upon doping with Sb. All samples except BaSn0.92Sb0.08O3 exhibit non-linear I-U characteristic, typical for semiconductors with potential barrier at grain boundaries. Low angle grain boundaries found only in BaSn0.92Sb0.08O3 caused the loss of potential barrier at grain boundaries which was confirmed by AC impedance spectroscopy measurements. Consequently, BaSn0.92Sb0.08O3 showed the lowest electrical resistivity and linear I-U characteristic. UV-vis analysis confirmed the increasing of band gap (Burstein-Moss shift) values in all doped samples.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics
EP  - 5575
IS  - 15
SP  - 5566
VL  - 40
DO  - 10.1016/j.jeurceramsoc.2020.06.062
ER  - 

@article{
author = "Mitrović, Jelena and Počuča-Nešić, Milica and Luković Golić, Danijela and Ribić, Vesna and Branković, Zorica and Savić, Slavica M. and Dapčević, Aleksandra and Bernik, Slavko and Podlogar, Matejka and Kocen, Matej and Rapljenović, Zeljko and Ivek, Tomislav and Lazović, Vladimir and Dojčinović, Biljana and Branković, Goran",
year = "2020",
abstract = "Antimony doped barium-stannate dense ceramic materials were synthesized using spark plasma sintering technique out of mechanically activated precursor powders. The influence of various Sb concentrations (x = 0.00 - 0.10) on properties of BaSn1-xSbxO3 ceramics was investigated. Relative densities of prepared samples were in the range of (79-96) %. TEM analysis revealed the presence of many dislocations in undoped BaSnO3, and their significant reduction upon doping with Sb. All samples except BaSn0.92Sb0.08O3 exhibit non-linear I-U characteristic, typical for semiconductors with potential barrier at grain boundaries. Low angle grain boundaries found only in BaSn0.92Sb0.08O3 caused the loss of potential barrier at grain boundaries which was confirmed by AC impedance spectroscopy measurements. Consequently, BaSn0.92Sb0.08O3 showed the lowest electrical resistivity and linear I-U characteristic. UV-vis analysis confirmed the increasing of band gap (Burstein-Moss shift) values in all doped samples.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics",
pages = "5575-5566",
number = "15",
volume = "40",
doi = "10.1016/j.jeurceramsoc.2020.06.062"
}

Mitrović, J., Počuča-Nešić, M., Luković Golić, D., Ribić, V., Branković, Z., Savić, S. M., Dapčević, A., Bernik, S., Podlogar, M., Kocen, M., Rapljenović, Z., Ivek, T., Lazović, V., Dojčinović, B.,& Branković, G.. (2020). The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 40(15), 5566-5575.
https://doi.org/10.1016/j.jeurceramsoc.2020.06.062

Mitrović J, Počuča-Nešić M, Luković Golić D, Ribić V, Branković Z, Savić SM, Dapčević A, Bernik S, Podlogar M, Kocen M, Rapljenović Z, Ivek T, Lazović V, Dojčinović B, Branković G. The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics. in Journal of the European Ceramic Society. 2020;40(15):5566-5575.
doi:10.1016/j.jeurceramsoc.2020.06.062 .

Mitrović, Jelena, Počuča-Nešić, Milica, Luković Golić, Danijela, Ribić, Vesna, Branković, Zorica, Savić, Slavica M., Dapčević, Aleksandra, Bernik, Slavko, Podlogar, Matejka, Kocen, Matej, Rapljenović, Zeljko, Ivek, Tomislav, Lazović, Vladimir, Dojčinović, Biljana, Branković, Goran, "The structural, electrical and optical properties of spark plasma sintered BaSn1-xSbxO3 ceramics" in Journal of the European Ceramic Society, 40, no. 15 (2020):5566-5575,
https://doi.org/10.1016/j.jeurceramsoc.2020.06.062 . .

TY  - CONF
AU  - Radojković, Aleksandar
AU  - Žunić, Milan
AU  - Savic, Slavica
AU  - Perać, Sanja
AU  - Vojisavljević, Katarina
AU  - Luković Golić, Danijela
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2307
AB  - Composition of BaCe0.9Y0.1O3-δ was changed by co-doping with 5 mole % of different cations (In3+, Zr4+ and Nb5+) to examine the influence of dopants on the electrolyte properties. The powder samples were synthesized by the citric-nitric autocombustion method. BaCe0.85Y0.1In0.05O3-δ was successfully sintered at 1400 °C for 5 h in air, while a complete sintering of the other materials was carried out at 1550 °C. This makes the doping with In a preferable method since sintering temperatures below 1500 °C can limit BaO evaporation. The presence of In and Nb caused a significant drop in the total conductivity (σ) of the ceramics at 700 °C in wet hydrogen, while the total conductivity of BaCe0.85Y0.1Zr0.05O3-δ was slightly lower than of BaCe0.9Y0.1O3-δ. The stability of the ceramics exposed to a 100 % CO2 atmosphere at 700 °C for 5 h was investigated by X-ray analysis.
BaCe0.85Y0.1In0.05O3-δ showed considerable stability under the aggressive conditions containing traces of secondary phases, while the other samples were partially or significantly decomposed. By taking into account the factors that can influence the stability and conductivity, it was found that the dopant electronegativity had a
decisive role both in inhibiting the carbonation and in decreasing the total conductivity of the ceramics.
PB  - Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia
C3  - 5th Conference of the Serbian Society for Ceramic Materials
T1  - Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping
SP  - 131
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2307
ER  - 

@conference{
author = "Radojković, Aleksandar and Žunić, Milan and Savic, Slavica and Perać, Sanja and Vojisavljević, Katarina and Luković Golić, Danijela and Branković, Zorica and Branković, Goran",
year = "2019",
abstract = "Composition of BaCe0.9Y0.1O3-δ was changed by co-doping with 5 mole % of different cations (In3+, Zr4+ and Nb5+) to examine the influence of dopants on the electrolyte properties. The powder samples were synthesized by the citric-nitric autocombustion method. BaCe0.85Y0.1In0.05O3-δ was successfully sintered at 1400 °C for 5 h in air, while a complete sintering of the other materials was carried out at 1550 °C. This makes the doping with In a preferable method since sintering temperatures below 1500 °C can limit BaO evaporation. The presence of In and Nb caused a significant drop in the total conductivity (σ) of the ceramics at 700 °C in wet hydrogen, while the total conductivity of BaCe0.85Y0.1Zr0.05O3-δ was slightly lower than of BaCe0.9Y0.1O3-δ. The stability of the ceramics exposed to a 100 % CO2 atmosphere at 700 °C for 5 h was investigated by X-ray analysis.
BaCe0.85Y0.1In0.05O3-δ showed considerable stability under the aggressive conditions containing traces of secondary phases, while the other samples were partially or significantly decomposed. By taking into account the factors that can influence the stability and conductivity, it was found that the dopant electronegativity had a
decisive role both in inhibiting the carbonation and in decreasing the total conductivity of the ceramics.",
publisher = "Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia",
journal = "5th Conference of the Serbian Society for Ceramic Materials",
title = "Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping",
pages = "131",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2307"
}

Radojković, A., Žunić, M., Savic, S., Perać, S., Vojisavljević, K., Luković Golić, D., Branković, Z.,& Branković, G.. (2019). Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping. in 5th Conference of the Serbian Society for Ceramic Materials
Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia., 131.
https://hdl.handle.net/21.15107/rcub_rimsi_2307

Radojković A, Žunić M, Savic S, Perać S, Vojisavljević K, Luković Golić D, Branković Z, Branković G. Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping. in 5th Conference of the Serbian Society for Ceramic Materials. 2019;:131.
https://hdl.handle.net/21.15107/rcub_rimsi_2307 .

Radojković, Aleksandar, Žunić, Milan, Savic, Slavica, Perać, Sanja, Vojisavljević, Katarina, Luković Golić, Danijela, Branković, Zorica, Branković, Goran, "Adjusting the electrolyte properties of BaCe0.9Y0.1O3–δ by co-doping" in 5th Conference of the Serbian Society for Ceramic Materials (2019):131,
https://hdl.handle.net/21.15107/rcub_rimsi_2307 .

TY  - CONF
AU  - Ćirković, Jovana
AU  - Luković Golić, Danijela
AU  - Radojković, Aleksandar
AU  - Dapčević, Aleksandra
AU  - Tasic, Nikola
AU  - Jovanović, Jelena
AU  - Čizmić, Mirta
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1775
AB  - BiFeO3 (BFO) precursor powder was synthesized by ultrasound asissted sol–gel route at relatively low temperature, starting from Bi-nitrate, Fe-nitrate, and ethylene glycol. Structural, optical, and photocatalytic properties of the obtained powder were investigated. X-ray diffraction analysis confirmed that thermal treatment of precursor powder at 500 °C led to formation of pure phase BiFeO3. BFO is p-type semiconductor where determined band gap was 2.20 eV, indicating its potential application as visible-light-response photocatalyst. Mott-Schottky measurements were performed to determine flat band potential and position of valence and conduction bands. Obtained BFO powder is used for photocatalytic degradation of typical organic azo dye Mordant Blue 9 in concentration of 50 mg/l. Measurements were performed for different times of irradiation and pH of the dye solution. Photodegradation products were analyzied by HPLC technique, and mechanism of photocatalytic degradation of organic dye was proposed.
PB  - Institute for Multidisciplinary Research, University of Belgrade  Kneza Višeslava 1, 11000 Belgrade, Serbia
C3  - The 5th International Conference of the Serbian Society for Ceramic Materials: 5CSCS-2019, Belgrade, Serbia
T1  - Structural, optical and photocatalytic properties of BiFeO3 nanoparticles
SP  - 95
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1775
ER  - 

@conference{
author = "Ćirković, Jovana and Luković Golić, Danijela and Radojković, Aleksandar and Dapčević, Aleksandra and Tasic, Nikola and Jovanović, Jelena and Čizmić, Mirta and Branković, Goran and Branković, Zorica",
year = "2019",
abstract = "BiFeO3 (BFO) precursor powder was synthesized by ultrasound asissted sol–gel route at relatively low temperature, starting from Bi-nitrate, Fe-nitrate, and ethylene glycol. Structural, optical, and photocatalytic properties of the obtained powder were investigated. X-ray diffraction analysis confirmed that thermal treatment of precursor powder at 500 °C led to formation of pure phase BiFeO3. BFO is p-type semiconductor where determined band gap was 2.20 eV, indicating its potential application as visible-light-response photocatalyst. Mott-Schottky measurements were performed to determine flat band potential and position of valence and conduction bands. Obtained BFO powder is used for photocatalytic degradation of typical organic azo dye Mordant Blue 9 in concentration of 50 mg/l. Measurements were performed for different times of irradiation and pH of the dye solution. Photodegradation products were analyzied by HPLC technique, and mechanism of photocatalytic degradation of organic dye was proposed.",
publisher = "Institute for Multidisciplinary Research, University of Belgrade  Kneza Višeslava 1, 11000 Belgrade, Serbia",
journal = "The 5th International Conference of the Serbian Society for Ceramic Materials: 5CSCS-2019, Belgrade, Serbia",
title = "Structural, optical and photocatalytic properties of BiFeO3 nanoparticles",
pages = "95",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1775"
}

Ćirković, J., Luković Golić, D., Radojković, A., Dapčević, A., Tasic, N., Jovanović, J., Čizmić, M., Branković, G.,& Branković, Z.. (2019). Structural, optical and photocatalytic properties of BiFeO3 nanoparticles. in The 5th International Conference of the Serbian Society for Ceramic Materials: 5CSCS-2019, Belgrade, Serbia
Institute for Multidisciplinary Research, University of Belgrade  Kneza Višeslava 1, 11000 Belgrade, Serbia., 95.
https://hdl.handle.net/21.15107/rcub_rimsi_1775

Ćirković J, Luković Golić D, Radojković A, Dapčević A, Tasic N, Jovanović J, Čizmić M, Branković G, Branković Z. Structural, optical and photocatalytic properties of BiFeO3 nanoparticles. in The 5th International Conference of the Serbian Society for Ceramic Materials: 5CSCS-2019, Belgrade, Serbia. 2019;:95.
https://hdl.handle.net/21.15107/rcub_rimsi_1775 .

Ćirković, Jovana, Luković Golić, Danijela, Radojković, Aleksandar, Dapčević, Aleksandra, Tasic, Nikola, Jovanović, Jelena, Čizmić, Mirta, Branković, Goran, Branković, Zorica, "Structural, optical and photocatalytic properties of BiFeO3 nanoparticles" in The 5th International Conference of the Serbian Society for Ceramic Materials: 5CSCS-2019, Belgrade, Serbia (2019):95,
https://hdl.handle.net/21.15107/rcub_rimsi_1775 .

TY  - CONF
AU  - Milošević, Olivera
AU  - Luković Golić, Danijela
AU  - Počuča-Nešić, Milica
AU  - Dapčević, Aleksandra
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Zemljak, Olivera
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2360
AB  - Yttrium manganite, YMnO3, is a multiferroic material, which exhibits ferroelectric and antiferromagnetic behavior. These properties make it suitable for various applications. Large microcracking and porosity in YMnO3 ceramics strongly affect the material’s ferroelectric response. In this work, the effect of Ti doping on structure, microstructure and ferroelectric properties of YMnO3 ceramics was investigated. The powders YMn1-xTixO3 (x = 0; 0.10; 0.15; 0.20) were prepared by polymerization complex (PC) method from citrate precursors, and calcined at 900 °C for 4 h. The ceramic samples YMnO3 (YMO) and YMn0.9Ti0.1O3 (YMTO10) were obtained after sintering at 1400 °C, YMn0.85Ti0.15O3 (YMTO15) – at 1450 C and YMn0.8Ti0.2O3 (YMTO20) – at 1470 °C, for 2 h. Structural properties and phase composition of sintered samples were analyzed by X-ray diffraction (XRD) and their microstructure by scanning electron microscopy (SEM). Ferroelectric characterization was carried out by measuring of P(E) hysteresis loops and leakage current density (jl). XRD patterns of all ceramic samples revealed single-phased hexagonal (P63cm) structure. It was observed that Ti-doped YMnO3 ceramic samples have reduced microcracking, inter- and intragranular porosity. Leakage current densities of the
samples YMTO10 and YMTO20 were lower compared to that of sample YMO. YMTO20 showed higher electrical conductivity, but all samples indicated weak ferroelectric response.
PB  - Institut za multicisciplinarna istrživanja, Belgrade, Serbia
C3  - 5th Conference of The Serbian Society for Ceramic Materials June 11-13, 2019 Belgrade, Serbia 5CSCS-2019
T1  - Structural, microstructural abd ferroelectric properties of Ti-doped YMnO3 ceramics synthesized by polymerization complex method
SP  - 133
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2360
ER  - 

@conference{
author = "Milošević, Olivera and Luković Golić, Danijela and Počuča-Nešić, Milica and Dapčević, Aleksandra and Branković, Goran and Branković, Zorica and Zemljak, Olivera",
year = "2019",
abstract = "Yttrium manganite, YMnO3, is a multiferroic material, which exhibits ferroelectric and antiferromagnetic behavior. These properties make it suitable for various applications. Large microcracking and porosity in YMnO3 ceramics strongly affect the material’s ferroelectric response. In this work, the effect of Ti doping on structure, microstructure and ferroelectric properties of YMnO3 ceramics was investigated. The powders YMn1-xTixO3 (x = 0; 0.10; 0.15; 0.20) were prepared by polymerization complex (PC) method from citrate precursors, and calcined at 900 °C for 4 h. The ceramic samples YMnO3 (YMO) and YMn0.9Ti0.1O3 (YMTO10) were obtained after sintering at 1400 °C, YMn0.85Ti0.15O3 (YMTO15) – at 1450 C and YMn0.8Ti0.2O3 (YMTO20) – at 1470 °C, for 2 h. Structural properties and phase composition of sintered samples were analyzed by X-ray diffraction (XRD) and their microstructure by scanning electron microscopy (SEM). Ferroelectric characterization was carried out by measuring of P(E) hysteresis loops and leakage current density (jl). XRD patterns of all ceramic samples revealed single-phased hexagonal (P63cm) structure. It was observed that Ti-doped YMnO3 ceramic samples have reduced microcracking, inter- and intragranular porosity. Leakage current densities of the
samples YMTO10 and YMTO20 were lower compared to that of sample YMO. YMTO20 showed higher electrical conductivity, but all samples indicated weak ferroelectric response.",
publisher = "Institut za multicisciplinarna istrživanja, Belgrade, Serbia",
journal = "5th Conference of The Serbian Society for Ceramic Materials June 11-13, 2019 Belgrade, Serbia 5CSCS-2019",
title = "Structural, microstructural abd ferroelectric properties of Ti-doped YMnO3 ceramics synthesized by polymerization complex method",
pages = "133",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2360"
}

Milošević, O., Luković Golić, D., Počuča-Nešić, M., Dapčević, A., Branković, G., Branković, Z.,& Zemljak, O.. (2019). Structural, microstructural abd ferroelectric properties of Ti-doped YMnO3 ceramics synthesized by polymerization complex method. in 5th Conference of The Serbian Society for Ceramic Materials June 11-13, 2019 Belgrade, Serbia 5CSCS-2019
Institut za multicisciplinarna istrživanja, Belgrade, Serbia., 133.
https://hdl.handle.net/21.15107/rcub_rimsi_2360

Milošević O, Luković Golić D, Počuča-Nešić M, Dapčević A, Branković G, Branković Z, Zemljak O. Structural, microstructural abd ferroelectric properties of Ti-doped YMnO3 ceramics synthesized by polymerization complex method. in 5th Conference of The Serbian Society for Ceramic Materials June 11-13, 2019 Belgrade, Serbia 5CSCS-2019. 2019;:133.
https://hdl.handle.net/21.15107/rcub_rimsi_2360 .

Milošević, Olivera, Luković Golić, Danijela, Počuča-Nešić, Milica, Dapčević, Aleksandra, Branković, Goran, Branković, Zorica, Zemljak, Olivera, "Structural, microstructural abd ferroelectric properties of Ti-doped YMnO3 ceramics synthesized by polymerization complex method" in 5th Conference of The Serbian Society for Ceramic Materials June 11-13, 2019 Belgrade, Serbia 5CSCS-2019 (2019):133,
https://hdl.handle.net/21.15107/rcub_rimsi_2360 .

TY  - CONF
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Luković Golić, Danijela
AU  - Ribić, Vesna
AU  - Branković, Zorica
AU  - Dapčević, Aleksandra
AU  - Bernik, Slavko
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2071
AB  - BaSnO3 (BSO) belongs to the perovskite-type oxides with a cubic crystal structure. It
exhibits interesting electrical, optical and photocatalytic properties. BSO has a potential
application as transparent conductor, gas sensor, photocatalyst or dielectric capacitor. It is
an insulating material with wide band gap (Eg = 3.1–3.4 eV), but its electrical properties
can be adjusted by doping with aliovalent cations.
In this work, we investigated the influence of antimony (Sb3+), as a dopant, on crystal
structure, microstructural and electrical properties of BSO ceramics. Stoichiometric
mixture of powders BaCO3, SnO2 and Sb2O3 was mechanochemically activated in a
planetary ball mill and afterwards calcined at 900 ºC for 4 h. As-prepared powders were
sintered by spark plasma sintering technique (1200 ºC for 5 min) in order to produce
ceramic samples BaSn1-xSbxO3 (x = 0.00, 0.04, 0.06, 0.08 and 0.10). All samples were
characterized using X-ray Diffraction (XRD) analysis, High Resolution Transmission
(HRTEM) and Field Emission Electron Microscopy (FESEM). Electrical conductivity of
BaSn1-xSbxO3 ceramics was determined by measuring of the current-voltage (I–U)
characteristics in different mediums and at different temperatures.
XRD analysis confirmed the existence of cubic BSO, as a dominant phase, and
tetragonal Ba2SnO4, as a secondary phase. FESEM analysis revealed homogenous
microstructure in all samples and noticeable decrease of the grain size in doped samples
compared to BSO. HRTEM micrographs of the undoped sample showed less ordered
microstructure with amorphous phase in the grain boundary region. Doped samples
revealed much higher crystallinity, especially in the grain boundary regions without
presence of defects. Low angle grain boundaries (LAGB) are observed (the angle equals
2.08°) on the HRTEM micrographs of BaSn0.92Sb0.08O3. It was observed that all doped
samples are n-type semiconductors, having linear I–U characteristics up to 150 °C.
Sample BaSn0.92Sb0.08O3 showed the highest conductivity, most likely due to the presence
of the LAGB, which allow easier charge carrier transfer between grains and greater
carrier mobility [1].
[1] Y. Furushima, A. Nakamura, E. Tochigi, Y. Ikuhara, K. Toyoura, K. Matsunaga, J.
Appl. Phys., 120 (2016) 1421071–1421079.
PB  - Serbian Crystallographic Society
C3  - 26th Conference of the Serbian Crystallographic Society, June 27-28, 2019, Silver Lake, Serbia
T1  - Structural, microstructural and electrical properties of Sb-doped BaSnO3 ceramics
EP  - 73
SP  - 72
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2071
ER  - 

@conference{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Luković Golić, Danijela and Ribić, Vesna and Branković, Zorica and Dapčević, Aleksandra and Bernik, Slavko and Branković, Goran",
year = "2019",
abstract = "BaSnO3 (BSO) belongs to the perovskite-type oxides with a cubic crystal structure. It
exhibits interesting electrical, optical and photocatalytic properties. BSO has a potential
application as transparent conductor, gas sensor, photocatalyst or dielectric capacitor. It is
an insulating material with wide band gap (Eg = 3.1–3.4 eV), but its electrical properties
can be adjusted by doping with aliovalent cations.
In this work, we investigated the influence of antimony (Sb3+), as a dopant, on crystal
structure, microstructural and electrical properties of BSO ceramics. Stoichiometric
mixture of powders BaCO3, SnO2 and Sb2O3 was mechanochemically activated in a
planetary ball mill and afterwards calcined at 900 ºC for 4 h. As-prepared powders were
sintered by spark plasma sintering technique (1200 ºC for 5 min) in order to produce
ceramic samples BaSn1-xSbxO3 (x = 0.00, 0.04, 0.06, 0.08 and 0.10). All samples were
characterized using X-ray Diffraction (XRD) analysis, High Resolution Transmission
(HRTEM) and Field Emission Electron Microscopy (FESEM). Electrical conductivity of
BaSn1-xSbxO3 ceramics was determined by measuring of the current-voltage (I–U)
characteristics in different mediums and at different temperatures.
XRD analysis confirmed the existence of cubic BSO, as a dominant phase, and
tetragonal Ba2SnO4, as a secondary phase. FESEM analysis revealed homogenous
microstructure in all samples and noticeable decrease of the grain size in doped samples
compared to BSO. HRTEM micrographs of the undoped sample showed less ordered
microstructure with amorphous phase in the grain boundary region. Doped samples
revealed much higher crystallinity, especially in the grain boundary regions without
presence of defects. Low angle grain boundaries (LAGB) are observed (the angle equals
2.08°) on the HRTEM micrographs of BaSn0.92Sb0.08O3. It was observed that all doped
samples are n-type semiconductors, having linear I–U characteristics up to 150 °C.
Sample BaSn0.92Sb0.08O3 showed the highest conductivity, most likely due to the presence
of the LAGB, which allow easier charge carrier transfer between grains and greater
carrier mobility [1].
[1] Y. Furushima, A. Nakamura, E. Tochigi, Y. Ikuhara, K. Toyoura, K. Matsunaga, J.
Appl. Phys., 120 (2016) 1421071–1421079.",
publisher = "Serbian Crystallographic Society",
journal = "26th Conference of the Serbian Crystallographic Society, June 27-28, 2019, Silver Lake, Serbia",
title = "Structural, microstructural and electrical properties of Sb-doped BaSnO3 ceramics",
pages = "73-72",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2071"
}

Vukašinović, J., Počuča-Nešić, M., Luković Golić, D., Ribić, V., Branković, Z., Dapčević, A., Bernik, S.,& Branković, G.. (2019). Structural, microstructural and electrical properties of Sb-doped BaSnO3 ceramics. in 26th Conference of the Serbian Crystallographic Society, June 27-28, 2019, Silver Lake, Serbia
Serbian Crystallographic Society., 72-73.
https://hdl.handle.net/21.15107/rcub_rimsi_2071

Vukašinović J, Počuča-Nešić M, Luković Golić D, Ribić V, Branković Z, Dapčević A, Bernik S, Branković G. Structural, microstructural and electrical properties of Sb-doped BaSnO3 ceramics. in 26th Conference of the Serbian Crystallographic Society, June 27-28, 2019, Silver Lake, Serbia. 2019;:72-73.
https://hdl.handle.net/21.15107/rcub_rimsi_2071 .

Vukašinović, Jelena, Počuča-Nešić, Milica, Luković Golić, Danijela, Ribić, Vesna, Branković, Zorica, Dapčević, Aleksandra, Bernik, Slavko, Branković, Goran, "Structural, microstructural and electrical properties of Sb-doped BaSnO3 ceramics" in 26th Conference of the Serbian Crystallographic Society, June 27-28, 2019, Silver Lake, Serbia (2019):72-73,
https://hdl.handle.net/21.15107/rcub_rimsi_2071 .

TY  - CONF
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Luković Golić, Danijela
AU  - Dapčević, Aleksandra
AU  - Kocen, Matej
AU  - Bernik, Slavko
AU  - Lazović, Vladimir
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2037
AB  - Barium stannate, BaSnO3, belongs to the group of perovskite-type alkaline earth
stannates. It is an electrical insulator, but doping with proper cation can change its’
electrical properties and transform it into an n-type semiconductor.
In this work, we present the Sb-doped barium stannate, BaSn1-xSbxO3, x = 0.00,
0.04, 0.06, 0.08 and 0.10 (labelled as BSSOx100), using BaCO3, SnO2 and Sb2O5
as starting materials. Mechanically activated precursors were calcined at 900 °C for
4 h and subsequently sintered by Spark Plasma Sintering (SPS) Technique. For the
characterization of obtained ceramic samples various techniques were used: X-ray
Diffraction (XRD) analysis, High Resolution Transmission and Field Emission
electron microscopy (HRTEM and FESEM) and UV-Vis spectroscopy. Electrical
conductivity of BaSn1-xSbxO3 ceramic samples was determined by measuring the
current-voltage (I–U) characteristics in different mediums (air, silicon oil) at room
temperature and temperatures up to 150 °C.
XRD analysis confirmed the formation of the cubic BaSnO3 perovskite phase as
a major, and tetragonal Ba2SnO4 as a secondary phase. The content of Ba2SnO4
phase decreased with introducing of Sb into the BaSnO3 lattice. FESEM
micrographs of fractured BaSn1-xSbxO3 ceramic samples showed well-densified
microstructure and decrease of grain size with the increment of x. HRTEM analyses
revealed the existence of low angle grain boundary (LAGB), which provides low
energy conduction path of electrons. The results obtained from UV-Vis
spectroscopy, indicated the decrease of band gap value of BaSn1-xSbxO3 samples
with increasing Sb concentration. Electrical characterization confirmed that Sbdoped
BaSnO3 exhibits n-type conductivity. BaSn1-xSbxO3 samples with x = 0.04,
0.06, 0.08 showed linear I–U characteristics at temperatures up to 150 ºC. The
highest electrical conductivity was 1.96 S/cm for the BaSn0.92Sb0.08O3. The increase
of Sb concentration to x = 0.10 led to the loss of I–U characteristics' linearity.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade
T1  - Spark plasma sintering of conductive Sb-doped BaSnO3
SP  - 136
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2037
ER  - 

@conference{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Luković Golić, Danijela and Dapčević, Aleksandra and Kocen, Matej and Bernik, Slavko and Lazović, Vladimir and Branković, Zorica and Branković, Goran",
year = "2019",
abstract = "Barium stannate, BaSnO3, belongs to the group of perovskite-type alkaline earth
stannates. It is an electrical insulator, but doping with proper cation can change its’
electrical properties and transform it into an n-type semiconductor.
In this work, we present the Sb-doped barium stannate, BaSn1-xSbxO3, x = 0.00,
0.04, 0.06, 0.08 and 0.10 (labelled as BSSOx100), using BaCO3, SnO2 and Sb2O5
as starting materials. Mechanically activated precursors were calcined at 900 °C for
4 h and subsequently sintered by Spark Plasma Sintering (SPS) Technique. For the
characterization of obtained ceramic samples various techniques were used: X-ray
Diffraction (XRD) analysis, High Resolution Transmission and Field Emission
electron microscopy (HRTEM and FESEM) and UV-Vis spectroscopy. Electrical
conductivity of BaSn1-xSbxO3 ceramic samples was determined by measuring the
current-voltage (I–U) characteristics in different mediums (air, silicon oil) at room
temperature and temperatures up to 150 °C.
XRD analysis confirmed the formation of the cubic BaSnO3 perovskite phase as
a major, and tetragonal Ba2SnO4 as a secondary phase. The content of Ba2SnO4
phase decreased with introducing of Sb into the BaSnO3 lattice. FESEM
micrographs of fractured BaSn1-xSbxO3 ceramic samples showed well-densified
microstructure and decrease of grain size with the increment of x. HRTEM analyses
revealed the existence of low angle grain boundary (LAGB), which provides low
energy conduction path of electrons. The results obtained from UV-Vis
spectroscopy, indicated the decrease of band gap value of BaSn1-xSbxO3 samples
with increasing Sb concentration. Electrical characterization confirmed that Sbdoped
BaSnO3 exhibits n-type conductivity. BaSn1-xSbxO3 samples with x = 0.04,
0.06, 0.08 showed linear I–U characteristics at temperatures up to 150 ºC. The
highest electrical conductivity was 1.96 S/cm for the BaSn0.92Sb0.08O3. The increase
of Sb concentration to x = 0.10 led to the loss of I–U characteristics' linearity.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade",
title = "Spark plasma sintering of conductive Sb-doped BaSnO3",
pages = "136",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2037"
}

Vukašinović, J., Počuča-Nešić, M., Luković Golić, D., Dapčević, A., Kocen, M., Bernik, S., Lazović, V., Branković, Z.,& Branković, G.. (2019). Spark plasma sintering of conductive Sb-doped BaSnO3. in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade
University of Belgrade, Institute for Multidisciplinary Research., 136.
https://hdl.handle.net/21.15107/rcub_rimsi_2037

Vukašinović J, Počuča-Nešić M, Luković Golić D, Dapčević A, Kocen M, Bernik S, Lazović V, Branković Z, Branković G. Spark plasma sintering of conductive Sb-doped BaSnO3. in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade. 2019;:136.
https://hdl.handle.net/21.15107/rcub_rimsi_2037 .

Vukašinović, Jelena, Počuča-Nešić, Milica, Luković Golić, Danijela, Dapčević, Aleksandra, Kocen, Matej, Bernik, Slavko, Lazović, Vladimir, Branković, Zorica, Branković, Goran, "Spark plasma sintering of conductive Sb-doped BaSnO3" in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade (2019):136,
https://hdl.handle.net/21.15107/rcub_rimsi_2037 .

TY  - CONF
AU  - Luković Golić, Danijela
AU  - Vukašinović, Jelena
AU  - Ribić, Vesna
AU  - Kocen, Matej
AU  - Podlogar, Matejka
AU  - Dapčević, Aleksandra
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2036
AB  - Zinc oxide (ZnO) is a versatile functional material, widely employed in industry
and technology as varistor ceramics, transparent conducting films, surface acoustic
wave resonators etc. ZnO-based conductive ceramics, attractive for various
applications, should have low electrical resistivity and good linearity. The n-type
conductivity of wide band gap (3.37 eV) ZnO semiconductor could be enhanced by
multiple doping with trivalent metals (B3+, Al3+, Ga3+, In3+), as shallow donors. The
intrinsic defects, zinc vacancies and interstitial oxygen, exist in the grain boundaries
of n-type ZnO ceramics as localized acceptor states. These states attract charge
carriers, creating a depletion region around the grain boundaries and energy
potential barrier, which hinder the motion of the electrons [1]. In this work, zinc
oxide ceramics doped with Al3+, B3+ and Mg2+ was prepared using solid-state
reaction technique from ZnO powder obtained in solvothermal synthesis and Al2O3,
MgO and B2O3 (H3BO3) commercial powders. Al2O3 was used as a donor dopant to
increase the carrier concentration, B2O3 was added to enhance densification and
grain growth, and MgO – to decrease the thermal conductivity [2,3]. The pressed
ZnO (0.25 % Al2O3, 0.5 % B2O3, 1 % MgO) pellets were sintered by conventional
(CS) and spark plasma (SPS) method. The ceramic samples were analyzed by X-ray
diffraction (XRD), scanning electron microscopy (SEM), transmission electron
microscopy (TEM), UV-Vis spectroscopy and current-voltage (I–U) measurements.
The correlation between the sintering processing, microstructure and electrical
properties of multiple doped ZnO-based ceramics was investigated. The electrical
performances of ZnO (0.25 % Al2O3, 0.5 % B2O3, 1 % MgO) ceramics were
strongly dependent on composition and microstructure (density, grain size,
segregation of secondary phase in grain boundaries). The electrical resistivity of SPS
sample was an order of magnitude lower than electrical resistivity of CS sample and
it showed almost linear I-U characteristics in temperature range of (25–150) C.
1. T.K. Gupta, W.G. Carlson, J. Mater. Sci., 20 (1985) 3487
2. T. Tian, L. Cheng, J. Xing, L. Zheng, Z. Man, D. Hu, S. Bernik, J. Zeng, J. Yang, Y.
Liu, G. Li, Mater. Design, 132 (2017) 479
3. B. Yuksel, T. O. Ozkan, Mater. Sci. – Poland, 33 (2015) 220
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
T1  - The influence of sintering processing on microstructural, optical and electrical properties of zinc oxide ceramics  doped with Al3+, B3+, Mg2+
EP  - 135
SP  - 134
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2036
ER  - 

@conference{
author = "Luković Golić, Danijela and Vukašinović, Jelena and Ribić, Vesna and Kocen, Matej and Podlogar, Matejka and Dapčević, Aleksandra and Branković, Goran and Branković, Zorica",
year = "2019",
abstract = "Zinc oxide (ZnO) is a versatile functional material, widely employed in industry
and technology as varistor ceramics, transparent conducting films, surface acoustic
wave resonators etc. ZnO-based conductive ceramics, attractive for various
applications, should have low electrical resistivity and good linearity. The n-type
conductivity of wide band gap (3.37 eV) ZnO semiconductor could be enhanced by
multiple doping with trivalent metals (B3+, Al3+, Ga3+, In3+), as shallow donors. The
intrinsic defects, zinc vacancies and interstitial oxygen, exist in the grain boundaries
of n-type ZnO ceramics as localized acceptor states. These states attract charge
carriers, creating a depletion region around the grain boundaries and energy
potential barrier, which hinder the motion of the electrons [1]. In this work, zinc
oxide ceramics doped with Al3+, B3+ and Mg2+ was prepared using solid-state
reaction technique from ZnO powder obtained in solvothermal synthesis and Al2O3,
MgO and B2O3 (H3BO3) commercial powders. Al2O3 was used as a donor dopant to
increase the carrier concentration, B2O3 was added to enhance densification and
grain growth, and MgO – to decrease the thermal conductivity [2,3]. The pressed
ZnO (0.25 % Al2O3, 0.5 % B2O3, 1 % MgO) pellets were sintered by conventional
(CS) and spark plasma (SPS) method. The ceramic samples were analyzed by X-ray
diffraction (XRD), scanning electron microscopy (SEM), transmission electron
microscopy (TEM), UV-Vis spectroscopy and current-voltage (I–U) measurements.
The correlation between the sintering processing, microstructure and electrical
properties of multiple doped ZnO-based ceramics was investigated. The electrical
performances of ZnO (0.25 % Al2O3, 0.5 % B2O3, 1 % MgO) ceramics were
strongly dependent on composition and microstructure (density, grain size,
segregation of secondary phase in grain boundaries). The electrical resistivity of SPS
sample was an order of magnitude lower than electrical resistivity of CS sample and
it showed almost linear I-U characteristics in temperature range of (25–150) C.
1. T.K. Gupta, W.G. Carlson, J. Mater. Sci., 20 (1985) 3487
2. T. Tian, L. Cheng, J. Xing, L. Zheng, Z. Man, D. Hu, S. Bernik, J. Zeng, J. Yang, Y.
Liu, G. Li, Mater. Design, 132 (2017) 479
3. B. Yuksel, T. O. Ozkan, Mater. Sci. – Poland, 33 (2015) 220",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia",
title = "The influence of sintering processing on microstructural, optical and electrical properties of zinc oxide ceramics  doped with Al3+, B3+, Mg2+",
pages = "135-134",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2036"
}

Luković Golić, D., Vukašinović, J., Ribić, V., Kocen, M., Podlogar, M., Dapčević, A., Branković, G.,& Branković, Z.. (2019). The influence of sintering processing on microstructural, optical and electrical properties of zinc oxide ceramics  doped with Al3+, B3+, Mg2+. in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research., 134-135.
https://hdl.handle.net/21.15107/rcub_rimsi_2036

Luković Golić D, Vukašinović J, Ribić V, Kocen M, Podlogar M, Dapčević A, Branković G, Branković Z. The influence of sintering processing on microstructural, optical and electrical properties of zinc oxide ceramics  doped with Al3+, B3+, Mg2+. in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia. 2019;:134-135.
https://hdl.handle.net/21.15107/rcub_rimsi_2036 .

Luković Golić, Danijela, Vukašinović, Jelena, Ribić, Vesna, Kocen, Matej, Podlogar, Matejka, Dapčević, Aleksandra, Branković, Goran, Branković, Zorica, "The influence of sintering processing on microstructural, optical and electrical properties of zinc oxide ceramics  doped with Al3+, B3+, Mg2+" in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia (2019):134-135,
https://hdl.handle.net/21.15107/rcub_rimsi_2036 .

TY  - CONF
AU  - Radojković, Aleksandar
AU  - Luković Golić, Danijela
AU  - Ćirković, Jovana
AU  - Pajić, Damir
AU  - Torić, Filip
AU  - Dapčević, Aleksandra
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1754
AB  - BiFeO3, as one of few multiferroic perovskites, is distinguished by some drawbacks such as high leakage current,
low remnant magnetic polarization, high electric coercive field, and difficulties of pure phase synthesis that still
keep it away from any practical use in electronics. There have been many attempts to improve the overall properties
of BiFeO3 by A- or B-site doping or by both. It was found that B-site doping with Nb can potentially improve both
the ferroelectric and magnetic properties of BiFeO3. In this study, BiFe1–xNbxO3 (x=0.002; 0.005 and 0.01) bulk ceramics
were investigated in the quest for a more integral understanding of changes in multiferroic properties caused by
light Nb doping (≤ 1 mole%). BiFe1–xNbxO3 powders were synthesized by hydro evaporation method and only traces
of the secondary phases were observed. Multiferroic properties of bulk ceramics were investigated using X-ray
diffraction (XRD) analysis, scanning electron spectroscopy (SEM), polarization (PMTS), and magnetization (SQUID)
techniques. It was shown that even small percentages of Nb could notably change the electric and magnetic
behavior of BiFeO3. The electric conductivity differed by two orders of magnitude between samples doped with
0.2 and 1% Nb. The ferroelectric behavior strongly depended on the conduction mechanism, and the transition from
space-charge-limited current (SCLC) conduction to trap-filled Limited (TFL) conduction regime reflected on a
change in hysteresis patterns, particularly for the samples with 0.2 and 0.5% Nb. ZFC-FC magnetization curves were
separated for all Nb concentrations and the degree of separation increased with Nb doping. Weak ferromagnetic
behavior was observed from the hysteresis measurements and the increase of remnant magnetization with Nb
concentration. The coercive magnetic field changed drastically compared to the pure BiFeO3, namely, the sample with
1% Nb exhibited a very high coercive magnetic field of ~10 kOe.
PB  - Innovinc International
C3  - 3rd World Chemistry Conference and Exhibition
T1  - Tuning of BiFeO3  multiferroic properties by light doping with Nb
SP  - 26
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1754
ER  - 

@conference{
author = "Radojković, Aleksandar and Luković Golić, Danijela and Ćirković, Jovana and Pajić, Damir and Torić, Filip and Dapčević, Aleksandra and Branković, Zorica and Branković, Goran",
year = "2019",
abstract = "BiFeO3, as one of few multiferroic perovskites, is distinguished by some drawbacks such as high leakage current,
low remnant magnetic polarization, high electric coercive field, and difficulties of pure phase synthesis that still
keep it away from any practical use in electronics. There have been many attempts to improve the overall properties
of BiFeO3 by A- or B-site doping or by both. It was found that B-site doping with Nb can potentially improve both
the ferroelectric and magnetic properties of BiFeO3. In this study, BiFe1–xNbxO3 (x=0.002; 0.005 and 0.01) bulk ceramics
were investigated in the quest for a more integral understanding of changes in multiferroic properties caused by
light Nb doping (≤ 1 mole%). BiFe1–xNbxO3 powders were synthesized by hydro evaporation method and only traces
of the secondary phases were observed. Multiferroic properties of bulk ceramics were investigated using X-ray
diffraction (XRD) analysis, scanning electron spectroscopy (SEM), polarization (PMTS), and magnetization (SQUID)
techniques. It was shown that even small percentages of Nb could notably change the electric and magnetic
behavior of BiFeO3. The electric conductivity differed by two orders of magnitude between samples doped with
0.2 and 1% Nb. The ferroelectric behavior strongly depended on the conduction mechanism, and the transition from
space-charge-limited current (SCLC) conduction to trap-filled Limited (TFL) conduction regime reflected on a
change in hysteresis patterns, particularly for the samples with 0.2 and 0.5% Nb. ZFC-FC magnetization curves were
separated for all Nb concentrations and the degree of separation increased with Nb doping. Weak ferromagnetic
behavior was observed from the hysteresis measurements and the increase of remnant magnetization with Nb
concentration. The coercive magnetic field changed drastically compared to the pure BiFeO3, namely, the sample with
1% Nb exhibited a very high coercive magnetic field of ~10 kOe.",
publisher = "Innovinc International",
journal = "3rd World Chemistry Conference and Exhibition",
title = "Tuning of BiFeO3  multiferroic properties by light doping with Nb",
pages = "26",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1754"
}

Radojković, A., Luković Golić, D., Ćirković, J., Pajić, D., Torić, F., Dapčević, A., Branković, Z.,& Branković, G.. (2019). Tuning of BiFeO3  multiferroic properties by light doping with Nb. in 3rd World Chemistry Conference and Exhibition
Innovinc International., 26.
https://hdl.handle.net/21.15107/rcub_rimsi_1754

Radojković A, Luković Golić D, Ćirković J, Pajić D, Torić F, Dapčević A, Branković Z, Branković G. Tuning of BiFeO3  multiferroic properties by light doping with Nb. in 3rd World Chemistry Conference and Exhibition. 2019;:26.
https://hdl.handle.net/21.15107/rcub_rimsi_1754 .

Radojković, Aleksandar, Luković Golić, Danijela, Ćirković, Jovana, Pajić, Damir, Torić, Filip, Dapčević, Aleksandra, Branković, Zorica, Branković, Goran, "Tuning of BiFeO3  multiferroic properties by light doping with Nb" in 3rd World Chemistry Conference and Exhibition (2019):26,
https://hdl.handle.net/21.15107/rcub_rimsi_1754 .

TY  - JOUR
AU  - Radojković, Aleksandar
AU  - Žunić, Milan
AU  - Savić, Slavica M.
AU  - Perać, Sanja
AU  - Luković Golić, Danijela
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1275
AB  - The properties of single-doped BaCe0.9Y0.1O3-delta and materials co-doped with 5 mol % of different cations (In3+, Zr4+ and Nb5+) with the general formula BaCe0.85Y0.1M0.05O3-delta were compared to examine the influence of dopants on the electrolyte properties. The samples were synthesized by the citric-nitric autocombustion method. BaCe0.85Y0.1In0.05O3-delta was successfully sintered at 1400 degrees C for 5 h in air, while a complete sintering of the other materials was carried out at 1550 degrees C. This makes the doping with In a preferable method since sintering temperatures below 1500 degrees C can limit BaO evaporation. The total conductivities (sigma) calculated from the electrical measurements at 700 degrees C in wet hydrogen decreased in the following order: BaCe0.9Y0.1O3-delta > BaCe0.85Y0.1Zr0.05O3-delta > BaCe0.85Y0.1Nb0.05O3-delta > BaCe0.85Y0.1In0.05O3-delta. The stability of the ceramics exposed to a 100% CO2 atmosphere at 700 degrees C for 5 h was examined by X-ray analysis. It was observed that only BaCe0.85Y0.1In0.05O3-delta could sustain the aggressive environment containing traces of secondary phases, while the other samples were partially or significantly decomposed. By taking into account the values of the Goldschmidt tolerance factor (t) and dopant electronegativity (chi), it was found that the dopant electronegativity had a decisive role in inhibiting the carbonation of the ceramics.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Co-doping as a strategy for tailoring the electrolyte properties of BaCe0.9Y0.1O3-delta
EP  - 8285
IS  - 7
SP  - 8279
VL  - 45
DO  - 10.1016/j.ceramint.2019.01.134
ER  - 

@article{
author = "Radojković, Aleksandar and Žunić, Milan and Savić, Slavica M. and Perać, Sanja and Luković Golić, Danijela and Branković, Zorica and Branković, Goran",
year = "2019",
abstract = "The properties of single-doped BaCe0.9Y0.1O3-delta and materials co-doped with 5 mol % of different cations (In3+, Zr4+ and Nb5+) with the general formula BaCe0.85Y0.1M0.05O3-delta were compared to examine the influence of dopants on the electrolyte properties. The samples were synthesized by the citric-nitric autocombustion method. BaCe0.85Y0.1In0.05O3-delta was successfully sintered at 1400 degrees C for 5 h in air, while a complete sintering of the other materials was carried out at 1550 degrees C. This makes the doping with In a preferable method since sintering temperatures below 1500 degrees C can limit BaO evaporation. The total conductivities (sigma) calculated from the electrical measurements at 700 degrees C in wet hydrogen decreased in the following order: BaCe0.9Y0.1O3-delta > BaCe0.85Y0.1Zr0.05O3-delta > BaCe0.85Y0.1Nb0.05O3-delta > BaCe0.85Y0.1In0.05O3-delta. The stability of the ceramics exposed to a 100% CO2 atmosphere at 700 degrees C for 5 h was examined by X-ray analysis. It was observed that only BaCe0.85Y0.1In0.05O3-delta could sustain the aggressive environment containing traces of secondary phases, while the other samples were partially or significantly decomposed. By taking into account the values of the Goldschmidt tolerance factor (t) and dopant electronegativity (chi), it was found that the dopant electronegativity had a decisive role in inhibiting the carbonation of the ceramics.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Co-doping as a strategy for tailoring the electrolyte properties of BaCe0.9Y0.1O3-delta",
pages = "8285-8279",
number = "7",
volume = "45",
doi = "10.1016/j.ceramint.2019.01.134"
}

Radojković, A., Žunić, M., Savić, S. M., Perać, S., Luković Golić, D., Branković, Z.,& Branković, G.. (2019). Co-doping as a strategy for tailoring the electrolyte properties of BaCe0.9Y0.1O3-delta. in Ceramics International
Elsevier Sci Ltd, Oxford., 45(7), 8279-8285.
https://doi.org/10.1016/j.ceramint.2019.01.134

Radojković A, Žunić M, Savić SM, Perać S, Luković Golić D, Branković Z, Branković G. Co-doping as a strategy for tailoring the electrolyte properties of BaCe0.9Y0.1O3-delta. in Ceramics International. 2019;45(7):8279-8285.
doi:10.1016/j.ceramint.2019.01.134 .

Radojković, Aleksandar, Žunić, Milan, Savić, Slavica M., Perać, Sanja, Luković Golić, Danijela, Branković, Zorica, Branković, Goran, "Co-doping as a strategy for tailoring the electrolyte properties of BaCe0.9Y0.1O3-delta" in Ceramics International, 45, no. 7 (2019):8279-8285,
https://doi.org/10.1016/j.ceramint.2019.01.134 . .

TY  - JOUR
AU  - Luković Golić, Danijela
AU  - Radojković, Aleksandar
AU  - Dapčević, Aleksandra
AU  - Pajić, Damir
AU  - Dragović, Jure
AU  - Toric, Filip
AU  - Ćirković, Jovana
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1199
AB  - Bismuth ferrite, BiFeO3, was doped with a wide range of concentrations (0-30%) of Gd in order to investigate structural, ferroelectric, and magnetic properties and their correlation. Powder samples of Bi1-xGdxFeO3 (x = 0.00-0.30) were prepared using the hydro-evaporation synthesis method. Sintering process at 870 degrees C for 6 h of as-prepared, Gd doped BiFeO3 powders resulted in ceramic samples with relative densities in the range of (74-86) %. XRD analysis revealed that Bi1-xGdxFeO3 samples (x = 0.00-0.09) crystallized in rhombohedral phase; Bi1-xGdxFeO3 samples (x = 0.10-0.20) contained both rhombohedral and orthorhombic phases, while Bi1-xGdxFeO3 (x = 0.30) sample contained only the orthorhombic phase. The structural parameters obtained after Rietveld refinement for single-phase Bi1-xGdxFeO3 ceramic samples and microstructure image analysis were correlated with the results of ferroelectric and magnetic measurements. Bi1-xGdxFeO3 (x = 0.0625, 0.075, 0.09) samples showed improved ferroelectric properties and reduced leakage current density in comparison with undoped BiFeO3. Gradual increase in Gd content in BiFeO3 led to enhanced magnetic responses and weak ferromagnetic behavior.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium
EP  - 19165
IS  - 15
SP  - 19158
VL  - 45
DO  - 10.1016/j.ceramint.2019.06.162
ER  - 

@article{
author = "Luković Golić, Danijela and Radojković, Aleksandar and Dapčević, Aleksandra and Pajić, Damir and Dragović, Jure and Toric, Filip and Ćirković, Jovana and Branković, Goran and Branković, Zorica",
year = "2019",
abstract = "Bismuth ferrite, BiFeO3, was doped with a wide range of concentrations (0-30%) of Gd in order to investigate structural, ferroelectric, and magnetic properties and their correlation. Powder samples of Bi1-xGdxFeO3 (x = 0.00-0.30) were prepared using the hydro-evaporation synthesis method. Sintering process at 870 degrees C for 6 h of as-prepared, Gd doped BiFeO3 powders resulted in ceramic samples with relative densities in the range of (74-86) %. XRD analysis revealed that Bi1-xGdxFeO3 samples (x = 0.00-0.09) crystallized in rhombohedral phase; Bi1-xGdxFeO3 samples (x = 0.10-0.20) contained both rhombohedral and orthorhombic phases, while Bi1-xGdxFeO3 (x = 0.30) sample contained only the orthorhombic phase. The structural parameters obtained after Rietveld refinement for single-phase Bi1-xGdxFeO3 ceramic samples and microstructure image analysis were correlated with the results of ferroelectric and magnetic measurements. Bi1-xGdxFeO3 (x = 0.0625, 0.075, 0.09) samples showed improved ferroelectric properties and reduced leakage current density in comparison with undoped BiFeO3. Gradual increase in Gd content in BiFeO3 led to enhanced magnetic responses and weak ferromagnetic behavior.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium",
pages = "19165-19158",
number = "15",
volume = "45",
doi = "10.1016/j.ceramint.2019.06.162"
}

Luković Golić, D., Radojković, A., Dapčević, A., Pajić, D., Dragović, J., Toric, F., Ćirković, J., Branković, G.,& Branković, Z.. (2019). Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium. in Ceramics International
Elsevier Sci Ltd, Oxford., 45(15), 19158-19165.
https://doi.org/10.1016/j.ceramint.2019.06.162

Luković Golić D, Radojković A, Dapčević A, Pajić D, Dragović J, Toric F, Ćirković J, Branković G, Branković Z. Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium. in Ceramics International. 2019;45(15):19158-19165.
doi:10.1016/j.ceramint.2019.06.162 .

Luković Golić, Danijela, Radojković, Aleksandar, Dapčević, Aleksandra, Pajić, Damir, Dragović, Jure, Toric, Filip, Ćirković, Jovana, Branković, Goran, Branković, Zorica, "Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium" in Ceramics International, 45, no. 15 (2019):19158-19165,
https://doi.org/10.1016/j.ceramint.2019.06.162 . .

TY  - CONF
AU  - Ćirković, Jovana
AU  - Luković Golić, Danijela
AU  - Radojković, Aleksandar
AU  - Dapčević, Aleksandra
AU  - Tasić, Nikola
AU  - Čizmić, Mirta
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2958
AB  - The preparation of pure BiFeO3 (BFO) powders and ceramics is still a challenging issue
because of a narrow temperature range of phase stabilization. The mechanism of BFO
synthesis reaction usually includes formation of secondary phases. In this work, BFO
precursor powders were synthesized by hydro-evaporation (HE) and ultrasound (US) assisted
sol–gel method. BFO precursor powder obtained by HE method was calcined at various
temperatures ranging from 620°C to 770°C for 6 h; while powder obtained by US route was
thermally treated at 500°C for 30 min, to form resulting BFO powders. Structural, optical,
and photocatalytic properties of the obtained powders were investigated. The X-ray
diffraction analysis of BFO powders prepared by HE method, confirmed the presence of
secondary phases, Bi25FeO39 and Bi2Fe4O9. On the other hand, X-ray diffraction analysis
confirmed the formation of pure phase nanosized BFO obtained by US route. Therefore, BFO
powder obtained by US method was selected for photocatalytic degradation of typical
organic azo dye Mordant Blue 9 in concentration of 50 mg/l. The determined band gap of US
obtained BFO powder was 2.20 eV, indicating its potential application as visible-lightresponse photocatalyst. Measurements were performed for different times of irradiation
and pH of the dye solution. Photodegradation products were analysed by HPLC technique,
and mechanism of photocatalytic degradation of organic dye was proposed.
PB  - CROATIAN ACADEMY OF SCIENCIES AND ARTS CROATIAN CRYSTALLOGRAPHIC ASSOCIATION ZAGREB, CROATIA
C3  - The Book of Abstracts / The 26th Croatian-Slovenian Crystallographic Meeting, Poreč, Croatia, June 13-17,2018.
T1  - BiFeO3-based nanoparticles obtained by different synthetic routes and their - structural, optical and photocatalytic properties
SP  - 60
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2958
ER  - 

@conference{
author = "Ćirković, Jovana and Luković Golić, Danijela and Radojković, Aleksandar and Dapčević, Aleksandra and Tasić, Nikola and Čizmić, Mirta and Branković, Goran and Branković, Zorica",
year = "2018",
abstract = "The preparation of pure BiFeO3 (BFO) powders and ceramics is still a challenging issue
because of a narrow temperature range of phase stabilization. The mechanism of BFO
synthesis reaction usually includes formation of secondary phases. In this work, BFO
precursor powders were synthesized by hydro-evaporation (HE) and ultrasound (US) assisted
sol–gel method. BFO precursor powder obtained by HE method was calcined at various
temperatures ranging from 620°C to 770°C for 6 h; while powder obtained by US route was
thermally treated at 500°C for 30 min, to form resulting BFO powders. Structural, optical,
and photocatalytic properties of the obtained powders were investigated. The X-ray
diffraction analysis of BFO powders prepared by HE method, confirmed the presence of
secondary phases, Bi25FeO39 and Bi2Fe4O9. On the other hand, X-ray diffraction analysis
confirmed the formation of pure phase nanosized BFO obtained by US route. Therefore, BFO
powder obtained by US method was selected for photocatalytic degradation of typical
organic azo dye Mordant Blue 9 in concentration of 50 mg/l. The determined band gap of US
obtained BFO powder was 2.20 eV, indicating its potential application as visible-lightresponse photocatalyst. Measurements were performed for different times of irradiation
and pH of the dye solution. Photodegradation products were analysed by HPLC technique,
and mechanism of photocatalytic degradation of organic dye was proposed.",
publisher = "CROATIAN ACADEMY OF SCIENCIES AND ARTS CROATIAN CRYSTALLOGRAPHIC ASSOCIATION ZAGREB, CROATIA",
journal = "The Book of Abstracts / The 26th Croatian-Slovenian Crystallographic Meeting, Poreč, Croatia, June 13-17,2018.",
title = "BiFeO3-based nanoparticles obtained by different synthetic routes and their - structural, optical and photocatalytic properties",
pages = "60",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2958"
}

Ćirković, J., Luković Golić, D., Radojković, A., Dapčević, A., Tasić, N., Čizmić, M., Branković, G.,& Branković, Z.. (2018). BiFeO3-based nanoparticles obtained by different synthetic routes and their - structural, optical and photocatalytic properties. in The Book of Abstracts / The 26th Croatian-Slovenian Crystallographic Meeting, Poreč, Croatia, June 13-17,2018.
CROATIAN ACADEMY OF SCIENCIES AND ARTS CROATIAN CRYSTALLOGRAPHIC ASSOCIATION ZAGREB, CROATIA., 60.
https://hdl.handle.net/21.15107/rcub_rimsi_2958

Ćirković J, Luković Golić D, Radojković A, Dapčević A, Tasić N, Čizmić M, Branković G, Branković Z. BiFeO3-based nanoparticles obtained by different synthetic routes and their - structural, optical and photocatalytic properties. in The Book of Abstracts / The 26th Croatian-Slovenian Crystallographic Meeting, Poreč, Croatia, June 13-17,2018.. 2018;:60.
https://hdl.handle.net/21.15107/rcub_rimsi_2958 .

Ćirković, Jovana, Luković Golić, Danijela, Radojković, Aleksandar, Dapčević, Aleksandra, Tasić, Nikola, Čizmić, Mirta, Branković, Goran, Branković, Zorica, "BiFeO3-based nanoparticles obtained by different synthetic routes and their - structural, optical and photocatalytic properties" in The Book of Abstracts / The 26th Croatian-Slovenian Crystallographic Meeting, Poreč, Croatia, June 13-17,2018. (2018):60,
https://hdl.handle.net/21.15107/rcub_rimsi_2958 .

TY  - CONF
AU  - Ribić, Vesna
AU  - Dapčević, Aleksandra
AU  - Skorodumova, Natalia
AU  - Rečnik, Aleksander
AU  - Luković Golić, Danijela
AU  - Branković, Goran
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2404
PB  - epcc, Edinburgh, UK
C3  - HPC–Europa Transnational Access Meeting (TAM 2018)
T1  - DFT screening of Gd as a dopant in the BiFeO3 superlattice
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2404
ER  - 

@conference{
author = "Ribić, Vesna and Dapčević, Aleksandra and Skorodumova, Natalia and Rečnik, Aleksander and Luković Golić, Danijela and Branković, Goran",
year = "2018",
publisher = "epcc, Edinburgh, UK",
journal = "HPC–Europa Transnational Access Meeting (TAM 2018)",
title = "DFT screening of Gd as a dopant in the BiFeO3 superlattice",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2404"
}

Ribić, V., Dapčević, A., Skorodumova, N., Rečnik, A., Luković Golić, D.,& Branković, G.. (2018). DFT screening of Gd as a dopant in the BiFeO3 superlattice. in HPC–Europa Transnational Access Meeting (TAM 2018)
epcc, Edinburgh, UK..
https://hdl.handle.net/21.15107/rcub_rimsi_2404

Ribić V, Dapčević A, Skorodumova N, Rečnik A, Luković Golić D, Branković G. DFT screening of Gd as a dopant in the BiFeO3 superlattice. in HPC–Europa Transnational Access Meeting (TAM 2018). 2018;.
https://hdl.handle.net/21.15107/rcub_rimsi_2404 .

Ribić, Vesna, Dapčević, Aleksandra, Skorodumova, Natalia, Rečnik, Aleksander, Luković Golić, Danijela, Branković, Goran, "DFT screening of Gd as a dopant in the BiFeO3 superlattice" in HPC–Europa Transnational Access Meeting (TAM 2018) (2018),
https://hdl.handle.net/21.15107/rcub_rimsi_2404 .

TY  - CONF
AU  - Ribić, Vesna
AU  - Dapčević, Aleksandra
AU  - Skorodumova, Natalia
AU  - Rečnik, Aleksander
AU  - Luković Golić, Danijela
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2394
PB  - HPC-Europa3, Ljubljana, Slovenija
C3  - European HPC Summit Week 2018 – #EHPCSW
T1  - First-Principles Calculation of Gd - doped BiFeO3
SP  - 28
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2394
ER  - 

@conference{
author = "Ribić, Vesna and Dapčević, Aleksandra and Skorodumova, Natalia and Rečnik, Aleksander and Luković Golić, Danijela and Branković, Zorica and Branković, Goran",
year = "2018",
publisher = "HPC-Europa3, Ljubljana, Slovenija",
journal = "European HPC Summit Week 2018 – #EHPCSW",
title = "First-Principles Calculation of Gd - doped BiFeO3",
pages = "28",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2394"
}

Ribić, V., Dapčević, A., Skorodumova, N., Rečnik, A., Luković Golić, D., Branković, Z.,& Branković, G.. (2018). First-Principles Calculation of Gd - doped BiFeO3. in European HPC Summit Week 2018 – #EHPCSW
HPC-Europa3, Ljubljana, Slovenija., 28.
https://hdl.handle.net/21.15107/rcub_rimsi_2394

Ribić V, Dapčević A, Skorodumova N, Rečnik A, Luković Golić D, Branković Z, Branković G. First-Principles Calculation of Gd - doped BiFeO3. in European HPC Summit Week 2018 – #EHPCSW. 2018;:28.
https://hdl.handle.net/21.15107/rcub_rimsi_2394 .

Ribić, Vesna, Dapčević, Aleksandra, Skorodumova, Natalia, Rečnik, Aleksander, Luković Golić, Danijela, Branković, Zorica, Branković, Goran, "First-Principles Calculation of Gd - doped BiFeO3" in European HPC Summit Week 2018 – #EHPCSW (2018):28,
https://hdl.handle.net/21.15107/rcub_rimsi_2394 .

TY  - CONF
AU  - Ribić, Vesna
AU  - Rečnik, Aleksander
AU  - Kokalj, Anton
AU  - Dražić, Goran
AU  - Podlogar, Matejka
AU  - Daneu, Nina
AU  - Komelj, Matej
AU  - Luković Golić, Danijela
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2434
AB  - Zinc oxide is an important semiconducting material that finds wide ranging applications. There has been considerable interest in ZnO as a low cost, non-toxic and highly stable thermoelectric. In order to enhance its properties for these purposes it is frequently doped with other compounds, usually oxides. Special impact on the improvement of TE properties in doped ZnO have planar defects. So far it  is well known that certain dopants trigger formation of inversion boundary (IB) in wurtzite structure of ZnO. These planar defects are interesting because they affect material properties and morphology of grains. In our study we investigated structure and chemistry of basal plane inversion boundaries in polycrystalline ZnO using conventional transmission electron microscopy and high-resolution electron microscopy. Based on HRTEM images we reconstructed models of IBs that are formed in addition of In, Sn and Sb as dopants. IBs can also be found in pyramidal planes and can be classified as head-to-head (→│←) or tail-to-tail (←│→) configuration depending on the orientation of the polar c-axis. By defining the zinc planes as A, B, or C and the oxygen planes as α, β or γ the perfect ZnO crystal structure has the AαBβAαBβ stacking sequence. Translation obtained from images is compared with three different, so far known, types of the head-to-head IB translations with octahedral coordination of cations at IB-plane: (i) IB with βγβγ׀α׀βαβα stacking of the cation sublattice, as observed with Sb doping1, (ii) IB with αγαγ׀α׀βαβα, as observed with In, Fe and Sn2 doping and (iii) IB with βαβα׀γ׀βαβα as observed with Mn3 doping (Figure 1). The generated models were examined in terms of stability by DFT calculations implemented in the Quantum-Espresso package.
PB  - Vinča Institute of Nuclear Sciences, University of Belgrade, Belgrade Hydrogen Economy Initiative Serbia, Belgrade, Belgrade, Serbia
C3  - PROGRAMME AND THE BOOK OF ABSTRACTS / 3rd International Symposium on Materials for Energy Storage and Conversion - mESC-IS 2018
T1  - Structural characterization of Inversion Boundaries in Doped ZnO
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2434
ER  - 

@conference{
author = "Ribić, Vesna and Rečnik, Aleksander and Kokalj, Anton and Dražić, Goran and Podlogar, Matejka and Daneu, Nina and Komelj, Matej and Luković Golić, Danijela and Branković, Zorica and Branković, Goran",
year = "2018",
abstract = "Zinc oxide is an important semiconducting material that finds wide ranging applications. There has been considerable interest in ZnO as a low cost, non-toxic and highly stable thermoelectric. In order to enhance its properties for these purposes it is frequently doped with other compounds, usually oxides. Special impact on the improvement of TE properties in doped ZnO have planar defects. So far it  is well known that certain dopants trigger formation of inversion boundary (IB) in wurtzite structure of ZnO. These planar defects are interesting because they affect material properties and morphology of grains. In our study we investigated structure and chemistry of basal plane inversion boundaries in polycrystalline ZnO using conventional transmission electron microscopy and high-resolution electron microscopy. Based on HRTEM images we reconstructed models of IBs that are formed in addition of In, Sn and Sb as dopants. IBs can also be found in pyramidal planes and can be classified as head-to-head (→│←) or tail-to-tail (←│→) configuration depending on the orientation of the polar c-axis. By defining the zinc planes as A, B, or C and the oxygen planes as α, β or γ the perfect ZnO crystal structure has the AαBβAαBβ stacking sequence. Translation obtained from images is compared with three different, so far known, types of the head-to-head IB translations with octahedral coordination of cations at IB-plane: (i) IB with βγβγ׀α׀βαβα stacking of the cation sublattice, as observed with Sb doping1, (ii) IB with αγαγ׀α׀βαβα, as observed with In, Fe and Sn2 doping and (iii) IB with βαβα׀γ׀βαβα as observed with Mn3 doping (Figure 1). The generated models were examined in terms of stability by DFT calculations implemented in the Quantum-Espresso package.",
publisher = "Vinča Institute of Nuclear Sciences, University of Belgrade, Belgrade Hydrogen Economy Initiative Serbia, Belgrade, Belgrade, Serbia",
journal = "PROGRAMME AND THE BOOK OF ABSTRACTS / 3rd International Symposium on Materials for Energy Storage and Conversion - mESC-IS 2018",
title = "Structural characterization of Inversion Boundaries in Doped ZnO",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2434"
}

Ribić, V., Rečnik, A., Kokalj, A., Dražić, G., Podlogar, M., Daneu, N., Komelj, M., Luković Golić, D., Branković, Z.,& Branković, G.. (2018). Structural characterization of Inversion Boundaries in Doped ZnO. in PROGRAMME AND THE BOOK OF ABSTRACTS / 3rd International Symposium on Materials for Energy Storage and Conversion - mESC-IS 2018
Vinča Institute of Nuclear Sciences, University of Belgrade, Belgrade Hydrogen Economy Initiative Serbia, Belgrade, Belgrade, Serbia..
https://hdl.handle.net/21.15107/rcub_rimsi_2434

Ribić V, Rečnik A, Kokalj A, Dražić G, Podlogar M, Daneu N, Komelj M, Luković Golić D, Branković Z, Branković G. Structural characterization of Inversion Boundaries in Doped ZnO. in PROGRAMME AND THE BOOK OF ABSTRACTS / 3rd International Symposium on Materials for Energy Storage and Conversion - mESC-IS 2018. 2018;.
https://hdl.handle.net/21.15107/rcub_rimsi_2434 .

Ribić, Vesna, Rečnik, Aleksander, Kokalj, Anton, Dražić, Goran, Podlogar, Matejka, Daneu, Nina, Komelj, Matej, Luković Golić, Danijela, Branković, Zorica, Branković, Goran, "Structural characterization of Inversion Boundaries in Doped ZnO" in PROGRAMME AND THE BOOK OF ABSTRACTS / 3rd International Symposium on Materials for Energy Storage and Conversion - mESC-IS 2018 (2018),
https://hdl.handle.net/21.15107/rcub_rimsi_2434 .

TY  - CONF
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Luković Golić, Danijela
AU  - Branković, Zorica
AU  - Dapčević, Aleksandra
AU  - Branković, Goran
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2086
AB  - Ternary lanthanum nickelates, La2NiO4, La3Ni2O7, La4Ni3O10 and LaNiO3 belong to Ruddlesden-Popper (RP) homologous series with the general formula Lan+1NinO3n+1, where n = 1, 2, 3 and ∞, respectively.The crystal structure of lanthanum nickelates consist of n perovskite layers (LaNiO3) separated by rocksalt layeres (LaO) along the crystallographic c direction. These compounds exhibit interesting electrical, magnetic, optical and catalytic properties. Owing to these properties, lanthanum nickelates find application such as catalysts in batteries and fuel cells, cathode materials for solid oxide fuel cells (SOFC), oxygen separation membranes, capacitors,
superconductors, electrical contacts and resistors. LaNiO3 (LNO) has a rhombohedrally distorted
perovskite structure. The conduction band in LNO is formed by the hybridization of the egorbitals
of Ni3+ and the p-orbitals of O2-. As a result, LNO has a metallic behaviour, which exibits
high electrical conductivity in wide range of temperature.
The main drawbacks of this material are poor density and thermal unstability at temepratures
above 850°C. Niobium, Nb5+, as a dopant could improve density and thermal stability of the
ceramic samples. Also, it could enhance electron concentration and mobility, leading to
improved electrical conductivity of ceramic. The type of atmosphere during thermal treatment
has an important influence on the stoichiometry of this material and preventing decomposition.
The aim of this work was to prepare ceramic materials of LaNi1-xNbxO3 (x = 0.005, 0.05) by
mechanochemically assisted solid state method. Commercial powders, La2O3, NiO and Nb2O5,
were mechanochemically activated in the planetary ball mill for 5 h and calcined at 700 °C for 3
h in air. Obtained powders were sintered at 900 °C and 1200 °C for 2 h and 10 h in various
atmospheres (air and oxygen). LaNi1-xNbxO3 ceramics was characterized by X-ray diffraction
(XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS).
The XRD analysis confirmed the existence of rhombohedral LaNiO3 and secondary phases,
Lan+1NinO3n+1 and NiO. Sintering in air atmosphere resulted in LaNiO3 ceramics with lower
content of secondary phases. However, sintering in oxygen atmosphere provided LaNi1-xNbxO3
ceramics with improved density, thermal stability and electrical conductivity.
C3  - Hot Topics in Contemporary Crystallography 3, HTCC3, workshop, September 23-27, 2018, Bol, Brač, Croatia
T1  - Influence of sintering temperature and various atmospheres on structural and electrical properties of LaNi1-xNbxO3 (x = 0.005, 0.05)
SP  - 59
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2086
ER  - 

@conference{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Luković Golić, Danijela and Branković, Zorica and Dapčević, Aleksandra and Branković, Goran",
year = "2018",
abstract = "Ternary lanthanum nickelates, La2NiO4, La3Ni2O7, La4Ni3O10 and LaNiO3 belong to Ruddlesden-Popper (RP) homologous series with the general formula Lan+1NinO3n+1, where n = 1, 2, 3 and ∞, respectively.The crystal structure of lanthanum nickelates consist of n perovskite layers (LaNiO3) separated by rocksalt layeres (LaO) along the crystallographic c direction. These compounds exhibit interesting electrical, magnetic, optical and catalytic properties. Owing to these properties, lanthanum nickelates find application such as catalysts in batteries and fuel cells, cathode materials for solid oxide fuel cells (SOFC), oxygen separation membranes, capacitors,
superconductors, electrical contacts and resistors. LaNiO3 (LNO) has a rhombohedrally distorted
perovskite structure. The conduction band in LNO is formed by the hybridization of the egorbitals
of Ni3+ and the p-orbitals of O2-. As a result, LNO has a metallic behaviour, which exibits
high electrical conductivity in wide range of temperature.
The main drawbacks of this material are poor density and thermal unstability at temepratures
above 850°C. Niobium, Nb5+, as a dopant could improve density and thermal stability of the
ceramic samples. Also, it could enhance electron concentration and mobility, leading to
improved electrical conductivity of ceramic. The type of atmosphere during thermal treatment
has an important influence on the stoichiometry of this material and preventing decomposition.
The aim of this work was to prepare ceramic materials of LaNi1-xNbxO3 (x = 0.005, 0.05) by
mechanochemically assisted solid state method. Commercial powders, La2O3, NiO and Nb2O5,
were mechanochemically activated in the planetary ball mill for 5 h and calcined at 700 °C for 3
h in air. Obtained powders were sintered at 900 °C and 1200 °C for 2 h and 10 h in various
atmospheres (air and oxygen). LaNi1-xNbxO3 ceramics was characterized by X-ray diffraction
(XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS).
The XRD analysis confirmed the existence of rhombohedral LaNiO3 and secondary phases,
Lan+1NinO3n+1 and NiO. Sintering in air atmosphere resulted in LaNiO3 ceramics with lower
content of secondary phases. However, sintering in oxygen atmosphere provided LaNi1-xNbxO3
ceramics with improved density, thermal stability and electrical conductivity.",
journal = "Hot Topics in Contemporary Crystallography 3, HTCC3, workshop, September 23-27, 2018, Bol, Brač, Croatia",
title = "Influence of sintering temperature and various atmospheres on structural and electrical properties of LaNi1-xNbxO3 (x = 0.005, 0.05)",
pages = "59",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2086"
}

Vukašinović, J., Počuča-Nešić, M., Luković Golić, D., Branković, Z., Dapčević, A.,& Branković, G.. (2018). Influence of sintering temperature and various atmospheres on structural and electrical properties of LaNi1-xNbxO3 (x = 0.005, 0.05). in Hot Topics in Contemporary Crystallography 3, HTCC3, workshop, September 23-27, 2018, Bol, Brač, Croatia, 59.
https://hdl.handle.net/21.15107/rcub_rimsi_2086

Vukašinović J, Počuča-Nešić M, Luković Golić D, Branković Z, Dapčević A, Branković G. Influence of sintering temperature and various atmospheres on structural and electrical properties of LaNi1-xNbxO3 (x = 0.005, 0.05). in Hot Topics in Contemporary Crystallography 3, HTCC3, workshop, September 23-27, 2018, Bol, Brač, Croatia. 2018;:59.
https://hdl.handle.net/21.15107/rcub_rimsi_2086 .

Vukašinović, Jelena, Počuča-Nešić, Milica, Luković Golić, Danijela, Branković, Zorica, Dapčević, Aleksandra, Branković, Goran, "Influence of sintering temperature and various atmospheres on structural and electrical properties of LaNi1-xNbxO3 (x = 0.005, 0.05)" in Hot Topics in Contemporary Crystallography 3, HTCC3, workshop, September 23-27, 2018, Bol, Brač, Croatia (2018):59,
https://hdl.handle.net/21.15107/rcub_rimsi_2086 .

TY  - CONF
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Luković Golić, Danijela
AU  - Branković, Zorica
AU  - Dapčević, Aleksandra
AU  - Branković, Goran
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2034
AB  - Perovskite type ceramic materials with general formula
ABO3 are very important class of materials due to their
various chemical and physical properties. They have wide
applications such as electrode material for solid state fuel
cells (SOFC), capacitors, resistors, superconductors,
catalysts, electrolytes, microwave devices, and
magnetoresitant materials [1, 2]. Lanthanum nickelate
(LaNiO3, LNO) is a ternary oxide with rhombohedrally
distorted perovskite lattice. In LNO trivalent nickel ions
(Ni3+) are in low spin configuration (t2g
6eg
1) and the
conduction band is formed by the hybridization of the egorbitals
of Ni3+ and the p-orbitals of oxygen. As a result,
LNO shows metallic n-type conductivity in wide temperature
range [3].
For this reason LNO has been proposed as a cathode material
for intermediate-temperature SOFCs (IT-SOFCs) with
operating temperature range of 650-800 °C. The possible
dawbacks of LNO as a potential material for this application
are poor density and thermal unstability at temperatures
higher than 850 °C, when LNO starts gradually to decompose
into the lower oxides Lan+1NinO3n+1 (n = 3, 2, 1) and NiO.
Still, all of these La-Ni-O compounds exhibit high electronic
conduction within the NiO6 octahedra in their perovskite
layers and excellent oxygen ionic conductivity through
oxygen interstitials on the LaO rock-salt plane. Also, their
coefficient of thermal expansion (CTE) matches those of
materials commonly used as IT-SOFC electrolyte and anode
[1].
A possible use of LNO as a cathode for SOFC requires the
improvement of its thermal stability and enhancement of
density of ceramic samples. The aim of this work was to
fullfill these requirements by doping of lanthanum-nickelate
into the B site. Using transition metal of higher valency than
Ni3+ as a dopant, could enhance the electron concentration
and carrier mobility, which results in improvement of
electrical conductivity of ceramic material. Doping could also
influence the sintering process and improve the density of the
ceramic materials.
In this work we present dense ceramic materials of LaNi1-
xNbxO3 (x = 0.005, 0.05) prepared by mechanochemically
assisted solid state method. La2O3, NiO and Nb2O5, used as a
precursor reagents, were mechanochemically activated in the
planetary ball mill for 5 h. Obtained powders were calcined at
700 °C for 3h in air, and afterwards sintered at 900 °C and
1200 °C for 2 h and 10 h in different atmospheres (air and
oxygen).
The influence of Nb doping on electrical properties and
microstructure of LaNi1-xNbxO3 ceramic materials was
investigated. All samples were analyzed by X-ray diffraction
analysis (XRD), scanning electron microscopy (SEM) and
energy dispersive X-ray spectroscopy (EDS). Electrical
conductivity of ceramic LaNi1-xNbxO3 samples was measured
in different mediums and complete characterization of
electrical properties was performed.
The XRD analysis indicated the existence of secondary
phases Lan+1NinO3n+1 and NiO along with the rhombohedral
LaNiO3. Samples sintered at 900 °C in oxygen atmosphere
for 2 h had density of 64 % and 60 % for x = 0.005 and x =
0.05 (Fig. 1). The electrical conductivity was improved by
doping with Nb, and obtained values were 2.7 S cm and 2.6 S
cm for x = 0.005 and x = 0.05 at room temperature. The
obtained results confirmed that doping by Nb along with
sintering in oxygen atmosphere can improve electrical
conductivity, density, and thermal stability.
References
[1] R.K. Sharma, E. Djurado, J Mater Chem A, 5 (2017)
22277-22287.
[2].A. S. Bhalla, R. Guo, R. Roy, Mat Res Innovat, 4 (2000)
3-26.
[3] K. Sreedhar et al., Phys Rev B, 46 (1992) 6382-6386.
PB  - University of Belgrade, Vinča Institute of Nuclear Sciences
PB  - Hydrogen Economy Initiative Serbia, Belgrade
C3  - 3rd International Symposium on Materials for Energy Storage and Conversion, mESC-IS, September 10-12, 2018, Belgrade, Serbia
T1  - Synthesis and characterization of Nb-doped lanthanum nickelate La(Ni,Nb)O3
SP  - 78
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2034
ER  - 

@conference{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Luković Golić, Danijela and Branković, Zorica and Dapčević, Aleksandra and Branković, Goran",
year = "2018",
abstract = "Perovskite type ceramic materials with general formula
ABO3 are very important class of materials due to their
various chemical and physical properties. They have wide
applications such as electrode material for solid state fuel
cells (SOFC), capacitors, resistors, superconductors,
catalysts, electrolytes, microwave devices, and
magnetoresitant materials [1, 2]. Lanthanum nickelate
(LaNiO3, LNO) is a ternary oxide with rhombohedrally
distorted perovskite lattice. In LNO trivalent nickel ions
(Ni3+) are in low spin configuration (t2g
6eg
1) and the
conduction band is formed by the hybridization of the egorbitals
of Ni3+ and the p-orbitals of oxygen. As a result,
LNO shows metallic n-type conductivity in wide temperature
range [3].
For this reason LNO has been proposed as a cathode material
for intermediate-temperature SOFCs (IT-SOFCs) with
operating temperature range of 650-800 °C. The possible
dawbacks of LNO as a potential material for this application
are poor density and thermal unstability at temperatures
higher than 850 °C, when LNO starts gradually to decompose
into the lower oxides Lan+1NinO3n+1 (n = 3, 2, 1) and NiO.
Still, all of these La-Ni-O compounds exhibit high electronic
conduction within the NiO6 octahedra in their perovskite
layers and excellent oxygen ionic conductivity through
oxygen interstitials on the LaO rock-salt plane. Also, their
coefficient of thermal expansion (CTE) matches those of
materials commonly used as IT-SOFC electrolyte and anode
[1].
A possible use of LNO as a cathode for SOFC requires the
improvement of its thermal stability and enhancement of
density of ceramic samples. The aim of this work was to
fullfill these requirements by doping of lanthanum-nickelate
into the B site. Using transition metal of higher valency than
Ni3+ as a dopant, could enhance the electron concentration
and carrier mobility, which results in improvement of
electrical conductivity of ceramic material. Doping could also
influence the sintering process and improve the density of the
ceramic materials.
In this work we present dense ceramic materials of LaNi1-
xNbxO3 (x = 0.005, 0.05) prepared by mechanochemically
assisted solid state method. La2O3, NiO and Nb2O5, used as a
precursor reagents, were mechanochemically activated in the
planetary ball mill for 5 h. Obtained powders were calcined at
700 °C for 3h in air, and afterwards sintered at 900 °C and
1200 °C for 2 h and 10 h in different atmospheres (air and
oxygen).
The influence of Nb doping on electrical properties and
microstructure of LaNi1-xNbxO3 ceramic materials was
investigated. All samples were analyzed by X-ray diffraction
analysis (XRD), scanning electron microscopy (SEM) and
energy dispersive X-ray spectroscopy (EDS). Electrical
conductivity of ceramic LaNi1-xNbxO3 samples was measured
in different mediums and complete characterization of
electrical properties was performed.
The XRD analysis indicated the existence of secondary
phases Lan+1NinO3n+1 and NiO along with the rhombohedral
LaNiO3. Samples sintered at 900 °C in oxygen atmosphere
for 2 h had density of 64 % and 60 % for x = 0.005 and x =
0.05 (Fig. 1). The electrical conductivity was improved by
doping with Nb, and obtained values were 2.7 S cm and 2.6 S
cm for x = 0.005 and x = 0.05 at room temperature. The
obtained results confirmed that doping by Nb along with
sintering in oxygen atmosphere can improve electrical
conductivity, density, and thermal stability.
References
[1] R.K. Sharma, E. Djurado, J Mater Chem A, 5 (2017)
22277-22287.
[2].A. S. Bhalla, R. Guo, R. Roy, Mat Res Innovat, 4 (2000)
3-26.
[3] K. Sreedhar et al., Phys Rev B, 46 (1992) 6382-6386.",
publisher = "University of Belgrade, Vinča Institute of Nuclear Sciences, Hydrogen Economy Initiative Serbia, Belgrade",
journal = "3rd International Symposium on Materials for Energy Storage and Conversion, mESC-IS, September 10-12, 2018, Belgrade, Serbia",
title = "Synthesis and characterization of Nb-doped lanthanum nickelate La(Ni,Nb)O3",
pages = "78",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2034"
}

Vukašinović, J., Počuča-Nešić, M., Luković Golić, D., Branković, Z., Dapčević, A.,& Branković, G.. (2018). Synthesis and characterization of Nb-doped lanthanum nickelate La(Ni,Nb)O3. in 3rd International Symposium on Materials for Energy Storage and Conversion, mESC-IS, September 10-12, 2018, Belgrade, Serbia
University of Belgrade, Vinča Institute of Nuclear Sciences., 78.
https://hdl.handle.net/21.15107/rcub_rimsi_2034

Vukašinović J, Počuča-Nešić M, Luković Golić D, Branković Z, Dapčević A, Branković G. Synthesis and characterization of Nb-doped lanthanum nickelate La(Ni,Nb)O3. in 3rd International Symposium on Materials for Energy Storage and Conversion, mESC-IS, September 10-12, 2018, Belgrade, Serbia. 2018;:78.
https://hdl.handle.net/21.15107/rcub_rimsi_2034 .

Vukašinović, Jelena, Počuča-Nešić, Milica, Luković Golić, Danijela, Branković, Zorica, Dapčević, Aleksandra, Branković, Goran, "Synthesis and characterization of Nb-doped lanthanum nickelate La(Ni,Nb)O3" in 3rd International Symposium on Materials for Energy Storage and Conversion, mESC-IS, September 10-12, 2018, Belgrade, Serbia (2018):78,
https://hdl.handle.net/21.15107/rcub_rimsi_2034 .

TY  - CONF
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Luković Golić, Danijela
AU  - Savic, Slavica
AU  - Branković, Zorica
AU  - Tasić, Nikola
AU  - Dapčević, Aleksandra
AU  - Bernik, Slavko
AU  - Kocen, Matej
AU  - Branković, Goran
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2035
AB  - Perovskite-type materials are widely important class of materials due to their
interesting physical properties, such as superconductivity, ferromagnetism,
ferroelectricity, piezoelectricity, and many others [1]. Barium stannate (BaSnO3) is
crystalizing in an ideal cubic structure, and has good chemical and thermal stability
at high temperatures up to 1200 °C. Undoped BaSnO3 is an n-type semiconductor
with a band gap of ~3.1 eV [1]. BaSnO3 finds application as dielectric ceramic
material, transparent conducting oxide (TCO), resistor, photocatalyst, photoanode
material, gas sensor for many gases, protonic conductor. Doping with antimony (Sb)
can improve the electrical conductivity and enhance density during sintering [1-4].
In this work samples of BaSn1-xSbxO3 (x = 0.04, 0.06, 0.08, 0.1) were prepared by
mechanochemically assisted solid state method. Precursor powders BaCO3, SnO2
and Sb2O3 were mechanochemically activated in isopropanol for 8h. After drying
prepared powders were calcined at 900 °C for 4h in air. Calcined powder were
mounted into a carbon die and subsequently sintered by spark plasma sintering (SPS)
at 1200 °C for 5 minutes. Structural properties of the obtained ceramic samples of
(BaSn1-xSbxO3) were completely characterized by X-ray diffraction (XRD), scanning
electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and
atomic force microscopy (AFM). Electrical properties of the ceramic BaSn1-xSbxO3
samples were determined by measuring the current-voltage characteristics at room
temperature and elevated temperatures in different mediums (air, silicon oil). The XRD analysis showed the formation of the cubic perovskite BaSnO3 as a major phase
and Ba2SnO4 as a secondary phase. The content of tetragonal secondary phase of
Ba2SnO4 was approximately the same in all samples. This confirmed that presence
of Sb did not influence the forming of Ba2SnO4. Ionic radius of Sb3+ (0.076 nm) is
larger than ionic radius of Sn4+ (0.069 nm), and it incorporation by lattice leads to
the increase of lattice parameter [4]. The cubic lattice parameter a was estimated to
be 0.41287(9), 0.41301(9), 0.41321(9) and 0.41302(4) nm for x =0.04, 0.06, 0.08 and
0.1, respectively. The relative densities were 95.2 %, 84.2 %, 85.9 % and 79.2 %
for x =0.04, 0.06, 0.08 and 0.1, respectively The SEM images of the fractured
surfaces of the obtained ceramics revealed that all samples were well-densified,
with the trend of reducing a grain size with increasing of Sb concentration. The
AFM images showed the existence of various particles shapes, with the particle
size of around 36 nm.

References:
[1] M Hiroshi et al, Chemistry of Materials 25 (19) (2013), 3858.
[2] Y Masahiro et al, Materials Science and Engineering B 173 (2010), 29.
[3] L Wenzhong et al, Sensors and Actuators 80 (2000), 35.
[4] Y Daisuke et al, Materials Science and Engineering B 173 (2010), 33.
[5] The authors would like to acknowledge the financial support of the Ministry of
Education, Science and Technological Development of the Republic of Serbia,
project III 45007.
PB  - Belgrade : Serbian Academy of Sciences and Arts
C3  - 1st International Conference: „Electron Microscopy of Nanostructures“, ELMINA, 2018 Conference, August 27-29, 2018, Belgrade, Serbia
T1  - Improvement of density and influence of Sb doping on structural properties of perovskite BaSnO3
EP  - 167
SP  - 166
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2035
ER  - 

@conference{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Luković Golić, Danijela and Savic, Slavica and Branković, Zorica and Tasić, Nikola and Dapčević, Aleksandra and Bernik, Slavko and Kocen, Matej and Branković, Goran",
year = "2018",
abstract = "Perovskite-type materials are widely important class of materials due to their
interesting physical properties, such as superconductivity, ferromagnetism,
ferroelectricity, piezoelectricity, and many others [1]. Barium stannate (BaSnO3) is
crystalizing in an ideal cubic structure, and has good chemical and thermal stability
at high temperatures up to 1200 °C. Undoped BaSnO3 is an n-type semiconductor
with a band gap of ~3.1 eV [1]. BaSnO3 finds application as dielectric ceramic
material, transparent conducting oxide (TCO), resistor, photocatalyst, photoanode
material, gas sensor for many gases, protonic conductor. Doping with antimony (Sb)
can improve the electrical conductivity and enhance density during sintering [1-4].
In this work samples of BaSn1-xSbxO3 (x = 0.04, 0.06, 0.08, 0.1) were prepared by
mechanochemically assisted solid state method. Precursor powders BaCO3, SnO2
and Sb2O3 were mechanochemically activated in isopropanol for 8h. After drying
prepared powders were calcined at 900 °C for 4h in air. Calcined powder were
mounted into a carbon die and subsequently sintered by spark plasma sintering (SPS)
at 1200 °C for 5 minutes. Structural properties of the obtained ceramic samples of
(BaSn1-xSbxO3) were completely characterized by X-ray diffraction (XRD), scanning
electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and
atomic force microscopy (AFM). Electrical properties of the ceramic BaSn1-xSbxO3
samples were determined by measuring the current-voltage characteristics at room
temperature and elevated temperatures in different mediums (air, silicon oil). The XRD analysis showed the formation of the cubic perovskite BaSnO3 as a major phase
and Ba2SnO4 as a secondary phase. The content of tetragonal secondary phase of
Ba2SnO4 was approximately the same in all samples. This confirmed that presence
of Sb did not influence the forming of Ba2SnO4. Ionic radius of Sb3+ (0.076 nm) is
larger than ionic radius of Sn4+ (0.069 nm), and it incorporation by lattice leads to
the increase of lattice parameter [4]. The cubic lattice parameter a was estimated to
be 0.41287(9), 0.41301(9), 0.41321(9) and 0.41302(4) nm for x =0.04, 0.06, 0.08 and
0.1, respectively. The relative densities were 95.2 %, 84.2 %, 85.9 % and 79.2 %
for x =0.04, 0.06, 0.08 and 0.1, respectively The SEM images of the fractured
surfaces of the obtained ceramics revealed that all samples were well-densified,
with the trend of reducing a grain size with increasing of Sb concentration. The
AFM images showed the existence of various particles shapes, with the particle
size of around 36 nm.

References:
[1] M Hiroshi et al, Chemistry of Materials 25 (19) (2013), 3858.
[2] Y Masahiro et al, Materials Science and Engineering B 173 (2010), 29.
[3] L Wenzhong et al, Sensors and Actuators 80 (2000), 35.
[4] Y Daisuke et al, Materials Science and Engineering B 173 (2010), 33.
[5] The authors would like to acknowledge the financial support of the Ministry of
Education, Science and Technological Development of the Republic of Serbia,
project III 45007.",
publisher = "Belgrade : Serbian Academy of Sciences and Arts",
journal = "1st International Conference: „Electron Microscopy of Nanostructures“, ELMINA, 2018 Conference, August 27-29, 2018, Belgrade, Serbia",
title = "Improvement of density and influence of Sb doping on structural properties of perovskite BaSnO3",
pages = "167-166",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2035"
}

Vukašinović, J., Počuča-Nešić, M., Luković Golić, D., Savic, S., Branković, Z., Tasić, N., Dapčević, A., Bernik, S., Kocen, M.,& Branković, G.. (2018). Improvement of density and influence of Sb doping on structural properties of perovskite BaSnO3. in 1st International Conference: „Electron Microscopy of Nanostructures“, ELMINA, 2018 Conference, August 27-29, 2018, Belgrade, Serbia
Belgrade : Serbian Academy of Sciences and Arts., 166-167.
https://hdl.handle.net/21.15107/rcub_rimsi_2035

Vukašinović J, Počuča-Nešić M, Luković Golić D, Savic S, Branković Z, Tasić N, Dapčević A, Bernik S, Kocen M, Branković G. Improvement of density and influence of Sb doping on structural properties of perovskite BaSnO3. in 1st International Conference: „Electron Microscopy of Nanostructures“, ELMINA, 2018 Conference, August 27-29, 2018, Belgrade, Serbia. 2018;:166-167.
https://hdl.handle.net/21.15107/rcub_rimsi_2035 .

Vukašinović, Jelena, Počuča-Nešić, Milica, Luković Golić, Danijela, Savic, Slavica, Branković, Zorica, Tasić, Nikola, Dapčević, Aleksandra, Bernik, Slavko, Kocen, Matej, Branković, Goran, "Improvement of density and influence of Sb doping on structural properties of perovskite BaSnO3" in 1st International Conference: „Electron Microscopy of Nanostructures“, ELMINA, 2018 Conference, August 27-29, 2018, Belgrade, Serbia (2018):166-167,
https://hdl.handle.net/21.15107/rcub_rimsi_2035 .

TY  - JOUR
AU  - Radojković, Aleksandar
AU  - Luković Golić, Danijela
AU  - Ćirković, Jovana
AU  - Marinković Stanojević, Zorica
AU  - Pajić, Damir
AU  - Toric, Filip
AU  - Dapčević, Aleksandra
AU  - Vulić, Predrag
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1162
AB  - Bulk ceramic samples of BiFeO3 were light doped (up to 1%) with Nb5+ in the place of Fe3+ (B-site doping) and their multiferroic properties were investigated using XRD, SEM, polarization (PMTS) and magnetization (SQUID) techniques. It is shown that even the small percentages of doping can notably change electric and magnetic behavior. Electric conductivity differs by two orders of magnitude between samples doped with 0.2% and 1% Nb. The ferroelectric behavior strongly depended on conduction mechanism, and transition from space-charge-limited current (SCLC) conduction to trap-filled limited (TFL) conduction regime reflected on a change in hysteresis patterns, particularly for the samples with 0.2% and 0.5% Nb. Separation of ZFC-FC magnetization curves occurred for all Nb concentrations and increased with Nb doping. Weak ferromagnetic behavior and the increase of remnant magnetization with Nb concentration was observed from the hysteresis measurements. Coercive field changed drastically compared to the pure BiFeO3, namely, the sample with 1% Nb exhibited very high coercive magnetic field of 10 kOe.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Tuning of BiFeO3 multiferroic properties by light doping with Nb
EP  - 16744
IS  - 14
SP  - 16739
VL  - 44
DO  - 10.1016/j.ceramint.2018.06.103
ER  - 

@article{
author = "Radojković, Aleksandar and Luković Golić, Danijela and Ćirković, Jovana and Marinković Stanojević, Zorica and Pajić, Damir and Toric, Filip and Dapčević, Aleksandra and Vulić, Predrag and Branković, Zorica and Branković, Goran",
year = "2018",
abstract = "Bulk ceramic samples of BiFeO3 were light doped (up to 1%) with Nb5+ in the place of Fe3+ (B-site doping) and their multiferroic properties were investigated using XRD, SEM, polarization (PMTS) and magnetization (SQUID) techniques. It is shown that even the small percentages of doping can notably change electric and magnetic behavior. Electric conductivity differs by two orders of magnitude between samples doped with 0.2% and 1% Nb. The ferroelectric behavior strongly depended on conduction mechanism, and transition from space-charge-limited current (SCLC) conduction to trap-filled limited (TFL) conduction regime reflected on a change in hysteresis patterns, particularly for the samples with 0.2% and 0.5% Nb. Separation of ZFC-FC magnetization curves occurred for all Nb concentrations and increased with Nb doping. Weak ferromagnetic behavior and the increase of remnant magnetization with Nb concentration was observed from the hysteresis measurements. Coercive field changed drastically compared to the pure BiFeO3, namely, the sample with 1% Nb exhibited very high coercive magnetic field of 10 kOe.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Tuning of BiFeO3 multiferroic properties by light doping with Nb",
pages = "16744-16739",
number = "14",
volume = "44",
doi = "10.1016/j.ceramint.2018.06.103"
}

Radojković, A., Luković Golić, D., Ćirković, J., Marinković Stanojević, Z., Pajić, D., Toric, F., Dapčević, A., Vulić, P., Branković, Z.,& Branković, G.. (2018). Tuning of BiFeO3 multiferroic properties by light doping with Nb. in Ceramics International
Elsevier Sci Ltd, Oxford., 44(14), 16739-16744.
https://doi.org/10.1016/j.ceramint.2018.06.103

Radojković A, Luković Golić D, Ćirković J, Marinković Stanojević Z, Pajić D, Toric F, Dapčević A, Vulić P, Branković Z, Branković G. Tuning of BiFeO3 multiferroic properties by light doping with Nb. in Ceramics International. 2018;44(14):16739-16744.
doi:10.1016/j.ceramint.2018.06.103 .

Radojković, Aleksandar, Luković Golić, Danijela, Ćirković, Jovana, Marinković Stanojević, Zorica, Pajić, Damir, Toric, Filip, Dapčević, Aleksandra, Vulić, Predrag, Branković, Zorica, Branković, Goran, "Tuning of BiFeO3 multiferroic properties by light doping with Nb" in Ceramics International, 44, no. 14 (2018):16739-16744,
https://doi.org/10.1016/j.ceramint.2018.06.103 . .