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 . .

TY  - CONF
AU  - Ćirković, Jovana
AU  - Vojisavljević, Katarina
AU  - Vulić, Predrag
AU  - Branković, Zorica
AU  - Dojčinović, Biljana
AU  - Srećković, Tatjana
AU  - Branković, Goran
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2754
AB  - Barium strontium titanate powder Ba0.8Sr0.2TiO3 (BST) has been obtained by
hydrothermal treatment of precursor solution containing titanium citrate, previously
prepared by complex polymerization method, and barium and strontium acetates.
The powders were calcined at 700 °C, pressed into pellets and further sintered at
1280 °C for a various sintering times (from 1 to 32 h), and structural parameters,
phase composition, dielectric and ferroelectric properties were investigated. Rietveld
refinement analysis of BST ceramics showed that predominant phase was tetragonal
BST with monoclinic Ba6Ti17O40 (B6T17) as a secondary phase. Phase contents
determined by Rietveld refinement match well with the results of energy dispersive
X-ray analysis and ICP analysis. SEM micrographs of sintered samples revealed the
abnormal grain growth where elongated twinned grains of BST grow in a matrix of
smaller B6T17 grains. Dielectric and ferroelectric properties of BST ceramics have
been correlated with density of sintered compacts, phase composition, structural
parameters and microstructure. The sample sintered for 16 h showed the highest
density (93% ρt), as well as the highest value of dielectric constant (~2300) and
remanent polarization – Pr (2 μC/cm2) among investigated samples.
PB  - Institute for Multidisciplinary Research, University of Belgrade
C3  - 3rd Conference of The Serbian Society for Ceramic Materials
T1  - BST CERAMICS OBTAINED BY HYDROTHERMALLY ASSISTED COMPLEX POLYMERIZATION METHOD
EP  - 84
SP  - 84
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2754
ER  - 

@conference{
author = "Ćirković, Jovana and Vojisavljević, Katarina and Vulić, Predrag and Branković, Zorica and Dojčinović, Biljana and Srećković, Tatjana and Branković, Goran",
year = "2015",
abstract = "Barium strontium titanate powder Ba0.8Sr0.2TiO3 (BST) has been obtained by
hydrothermal treatment of precursor solution containing titanium citrate, previously
prepared by complex polymerization method, and barium and strontium acetates.
The powders were calcined at 700 °C, pressed into pellets and further sintered at
1280 °C for a various sintering times (from 1 to 32 h), and structural parameters,
phase composition, dielectric and ferroelectric properties were investigated. Rietveld
refinement analysis of BST ceramics showed that predominant phase was tetragonal
BST with monoclinic Ba6Ti17O40 (B6T17) as a secondary phase. Phase contents
determined by Rietveld refinement match well with the results of energy dispersive
X-ray analysis and ICP analysis. SEM micrographs of sintered samples revealed the
abnormal grain growth where elongated twinned grains of BST grow in a matrix of
smaller B6T17 grains. Dielectric and ferroelectric properties of BST ceramics have
been correlated with density of sintered compacts, phase composition, structural
parameters and microstructure. The sample sintered for 16 h showed the highest
density (93% ρt), as well as the highest value of dielectric constant (~2300) and
remanent polarization – Pr (2 μC/cm2) among investigated samples.",
publisher = "Institute for Multidisciplinary Research, University of Belgrade",
journal = "3rd Conference of The Serbian Society for Ceramic Materials",
title = "BST CERAMICS OBTAINED BY HYDROTHERMALLY ASSISTED COMPLEX POLYMERIZATION METHOD",
pages = "84-84",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2754"
}

Ćirković, J., Vojisavljević, K., Vulić, P., Branković, Z., Dojčinović, B., Srećković, T.,& Branković, G.. (2015). BST CERAMICS OBTAINED BY HYDROTHERMALLY ASSISTED COMPLEX POLYMERIZATION METHOD. in 3rd Conference of The Serbian Society for Ceramic Materials
Institute for Multidisciplinary Research, University of Belgrade., 84-84.
https://hdl.handle.net/21.15107/rcub_rimsi_2754

Ćirković J, Vojisavljević K, Vulić P, Branković Z, Dojčinović B, Srećković T, Branković G. BST CERAMICS OBTAINED BY HYDROTHERMALLY ASSISTED COMPLEX POLYMERIZATION METHOD. in 3rd Conference of The Serbian Society for Ceramic Materials. 2015;:84-84.
https://hdl.handle.net/21.15107/rcub_rimsi_2754 .

Ćirković, Jovana, Vojisavljević, Katarina, Vulić, Predrag, Branković, Zorica, Dojčinović, Biljana, Srećković, Tatjana, Branković, Goran, "BST CERAMICS OBTAINED BY HYDROTHERMALLY ASSISTED COMPLEX POLYMERIZATION METHOD" in 3rd Conference of The Serbian Society for Ceramic Materials (2015):84-84,
https://hdl.handle.net/21.15107/rcub_rimsi_2754 .

TY  - JOUR
AU  - Ćirković, Jovana
AU  - Vojisavljević, Katarina
AU  - Nikolić, Nenad
AU  - Vulić, Predrag
AU  - Branković, Zorica
AU  - Srećković, Tatjana
AU  - Branković, Goran
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/883
AB  - Ba0.8Sr0.2TiO3 (BST) powder, obtained by a hydrothermal treatment of precursor solution previously prepared by a complex polymerization method (HT-CPM), was uniaxially pressed and sintered at 1280 degrees C for 1-32 h. The sintering effect on structural parameters, phase composition, dielectric and ferroelectric properties was investigated. Rietveld refinement analysis of BST ceramics showed that predominant phase was tetragonal BST with monoclinic Ba6Ti17O40 (B6T17) as a secondary phase. Phase contents determined by Rietveld refinement match well with the results of energy dispersive X-ray analysis. Dielectric and ferroelectric properties of BST ceramics have been correlated with density of sintered compacts, phase composition, structural parameters and microstructure. The sample sintered for 16 h showed the highest density (93% rho(t)), as well as the highest value of dielectric constant (similar to 2300) and remanent polarization - Pr (2 mu C/cm(2)) among investigated samples.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Dielectric and ferroelectric properties of BST ceramics obtained by a hydrothermally assisted complex polymerization method
EP  - 11313
IS  - 9
SP  - 11306
VL  - 41
DO  - 10.1016/j.ceramint.2015.05.088
ER  - 

@article{
author = "Ćirković, Jovana and Vojisavljević, Katarina and Nikolić, Nenad and Vulić, Predrag and Branković, Zorica and Srećković, Tatjana and Branković, Goran",
year = "2015",
abstract = "Ba0.8Sr0.2TiO3 (BST) powder, obtained by a hydrothermal treatment of precursor solution previously prepared by a complex polymerization method (HT-CPM), was uniaxially pressed and sintered at 1280 degrees C for 1-32 h. The sintering effect on structural parameters, phase composition, dielectric and ferroelectric properties was investigated. Rietveld refinement analysis of BST ceramics showed that predominant phase was tetragonal BST with monoclinic Ba6Ti17O40 (B6T17) as a secondary phase. Phase contents determined by Rietveld refinement match well with the results of energy dispersive X-ray analysis. Dielectric and ferroelectric properties of BST ceramics have been correlated with density of sintered compacts, phase composition, structural parameters and microstructure. The sample sintered for 16 h showed the highest density (93% rho(t)), as well as the highest value of dielectric constant (similar to 2300) and remanent polarization - Pr (2 mu C/cm(2)) among investigated samples.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Dielectric and ferroelectric properties of BST ceramics obtained by a hydrothermally assisted complex polymerization method",
pages = "11313-11306",
number = "9",
volume = "41",
doi = "10.1016/j.ceramint.2015.05.088"
}

Ćirković, J., Vojisavljević, K., Nikolić, N., Vulić, P., Branković, Z., Srećković, T.,& Branković, G.. (2015). Dielectric and ferroelectric properties of BST ceramics obtained by a hydrothermally assisted complex polymerization method. in Ceramics International
Elsevier Sci Ltd, Oxford., 41(9), 11306-11313.
https://doi.org/10.1016/j.ceramint.2015.05.088

Ćirković J, Vojisavljević K, Nikolić N, Vulić P, Branković Z, Srećković T, Branković G. Dielectric and ferroelectric properties of BST ceramics obtained by a hydrothermally assisted complex polymerization method. in Ceramics International. 2015;41(9):11306-11313.
doi:10.1016/j.ceramint.2015.05.088 .

Ćirković, Jovana, Vojisavljević, Katarina, Nikolić, Nenad, Vulić, Predrag, Branković, Zorica, Srećković, Tatjana, Branković, Goran, "Dielectric and ferroelectric properties of BST ceramics obtained by a hydrothermally assisted complex polymerization method" in Ceramics International, 41, no. 9 (2015):11306-11313,
https://doi.org/10.1016/j.ceramint.2015.05.088 . .

TY  - JOUR
AU  - Marinković Stanojević, Zorica
AU  - Mančić, Lidija T
AU  - Vulić, Predrag
AU  - Milošević, Olivera
PY  - 2005
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/113
AB  - An equimolar mixtures of starting ZnO and Cr2O3 powders were mechanically activated by grinding using a planetary ball mill for various periods of time (40-320min). Formation of nanocrystalline ZnCr2O4 as normal spine] structure at room temperature is detected in all samples-after ball-milling. A detailed XRD structural analysis (the relative phase abundances of different phases, lattice parameter changes, site occupancy, the average primary crystallite sizes, crystal lattice microstrains) is realized by the pattern decomposition technique, performed in accordance with the procedure based on Rietveld software KOALARIET-XFIT. Due to the importance of cation distribution on the chemical and physical properties of spinels, a study of site occupation factors of ZnCr2O4 spinels has been undertaken. The calculation based on the atomistic methods for the description of the perfect and defect spinel ZnCr2O4 crystal lattice is applied and the presence of the individual structural defects is determined.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - Microstructural characterization of mechanically activated ZnO-Cr2O3 system
EP  - 2084
IS  - 12
SP  - 2081
VL  - 25
DO  - 10.1016/j.jeurceramsoc.2005.03.085
ER  - 

@article{
author = "Marinković Stanojević, Zorica and Mančić, Lidija T and Vulić, Predrag and Milošević, Olivera",
year = "2005",
abstract = "An equimolar mixtures of starting ZnO and Cr2O3 powders were mechanically activated by grinding using a planetary ball mill for various periods of time (40-320min). Formation of nanocrystalline ZnCr2O4 as normal spine] structure at room temperature is detected in all samples-after ball-milling. A detailed XRD structural analysis (the relative phase abundances of different phases, lattice parameter changes, site occupancy, the average primary crystallite sizes, crystal lattice microstrains) is realized by the pattern decomposition technique, performed in accordance with the procedure based on Rietveld software KOALARIET-XFIT. Due to the importance of cation distribution on the chemical and physical properties of spinels, a study of site occupation factors of ZnCr2O4 spinels has been undertaken. The calculation based on the atomistic methods for the description of the perfect and defect spinel ZnCr2O4 crystal lattice is applied and the presence of the individual structural defects is determined.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "Microstructural characterization of mechanically activated ZnO-Cr2O3 system",
pages = "2084-2081",
number = "12",
volume = "25",
doi = "10.1016/j.jeurceramsoc.2005.03.085"
}

Marinković Stanojević, Z., Mančić, L. T., Vulić, P.,& Milošević, O.. (2005). Microstructural characterization of mechanically activated ZnO-Cr2O3 system. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 25(12), 2081-2084.
https://doi.org/10.1016/j.jeurceramsoc.2005.03.085

Marinković Stanojević Z, Mančić LT, Vulić P, Milošević O. Microstructural characterization of mechanically activated ZnO-Cr2O3 system. in Journal of the European Ceramic Society. 2005;25(12):2081-2084.
doi:10.1016/j.jeurceramsoc.2005.03.085 .

Marinković Stanojević, Zorica, Mančić, Lidija T, Vulić, Predrag, Milošević, Olivera, "Microstructural characterization of mechanically activated ZnO-Cr2O3 system" in Journal of the European Ceramic Society, 25, no. 12 (2005):2081-2084,
https://doi.org/10.1016/j.jeurceramsoc.2005.03.085 . .