TY  - JOUR
AU  - Perać, Sanja
AU  - Savić, Slavica M.
AU  - Branković, Zorica
AU  - Jaglicic, Zvonko
AU  - Vrtnik, Stanislav
AU  - Branković, Goran
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1029
AB  - Polycrystalline samples of NaCo2-xCuxO4 (x=0, 0.01, 0.03 and 0.05) were synthesized in two different ways: 1) by a mechanochemically assisted solid-state reaction method (MASSR) and 2) by a citric acid complex method (CAC). In this work we examined the influence of these synthesis routes and small Cu concentrations on magnetic properties and the heat capacity of sintered samples. The magnetic susceptibility (chi) of all samples followed the Curie-Weiss law in the temperature range between 50 K and 300 K, while a negative Weiss constant (theta) implied an antiferromagnetic interaction. According to the magnetic susceptibility data, a peak around 30 K indicating the presence of Co3O4 as a secondary phase appeared for all MASSR samples and CAC samples with Cu content above 1%. The effective magnetic moment (mu(eff)) of CAC samples was lower than the theoretical, spin only value obtained for the Co4+ ion in the low spin state indicating the presence of low spin Co3+(S = 0). These values were also lower compared to the values obtained for MASSR samples. The highest mu(eff) of 1.75 mu B/atom Co was obtained for the undoped MASSR sample. The heat capacity of CAC samples at 2 K decreased with Cu concentration due to lowering of the electronic specific heat coefficient (gamma). The highest gamma of 63.9 mJ/molK(2) was obtained for the undoped CAC sample. This reduction in gamma values was the result of the decrease of the density of state and/or mass enhancement factor.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Antiferromagnetism and heat capacity of NaCo2-xCuxO4 ceramics
EP  - 2026
IS  - 2
SP  - 2022
VL  - 43
DO  - 10.1016/j.ceramint.2016.10.170
ER  - 

@article{
author = "Perać, Sanja and Savić, Slavica M. and Branković, Zorica and Jaglicic, Zvonko and Vrtnik, Stanislav and Branković, Goran",
year = "2017",
abstract = "Polycrystalline samples of NaCo2-xCuxO4 (x=0, 0.01, 0.03 and 0.05) were synthesized in two different ways: 1) by a mechanochemically assisted solid-state reaction method (MASSR) and 2) by a citric acid complex method (CAC). In this work we examined the influence of these synthesis routes and small Cu concentrations on magnetic properties and the heat capacity of sintered samples. The magnetic susceptibility (chi) of all samples followed the Curie-Weiss law in the temperature range between 50 K and 300 K, while a negative Weiss constant (theta) implied an antiferromagnetic interaction. According to the magnetic susceptibility data, a peak around 30 K indicating the presence of Co3O4 as a secondary phase appeared for all MASSR samples and CAC samples with Cu content above 1%. The effective magnetic moment (mu(eff)) of CAC samples was lower than the theoretical, spin only value obtained for the Co4+ ion in the low spin state indicating the presence of low spin Co3+(S = 0). These values were also lower compared to the values obtained for MASSR samples. The highest mu(eff) of 1.75 mu B/atom Co was obtained for the undoped MASSR sample. The heat capacity of CAC samples at 2 K decreased with Cu concentration due to lowering of the electronic specific heat coefficient (gamma). The highest gamma of 63.9 mJ/molK(2) was obtained for the undoped CAC sample. This reduction in gamma values was the result of the decrease of the density of state and/or mass enhancement factor.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Antiferromagnetism and heat capacity of NaCo2-xCuxO4 ceramics",
pages = "2026-2022",
number = "2",
volume = "43",
doi = "10.1016/j.ceramint.2016.10.170"
}

Perać, S., Savić, S. M., Branković, Z., Jaglicic, Z., Vrtnik, S.,& Branković, G.. (2017). Antiferromagnetism and heat capacity of NaCo2-xCuxO4 ceramics. in Ceramics International
Elsevier Sci Ltd, Oxford., 43(2), 2022-2026.
https://doi.org/10.1016/j.ceramint.2016.10.170

Perać S, Savić SM, Branković Z, Jaglicic Z, Vrtnik S, Branković G. Antiferromagnetism and heat capacity of NaCo2-xCuxO4 ceramics. in Ceramics International. 2017;43(2):2022-2026.
doi:10.1016/j.ceramint.2016.10.170 .

Perać, Sanja, Savić, Slavica M., Branković, Zorica, Jaglicic, Zvonko, Vrtnik, Stanislav, Branković, Goran, "Antiferromagnetism and heat capacity of NaCo2-xCuxO4 ceramics" in Ceramics International, 43, no. 2 (2017):2022-2026,
https://doi.org/10.1016/j.ceramint.2016.10.170 . .

TY  - JOUR
AU  - Tadic, Marin M
AU  - Savić, Slavica M.
AU  - Jaglicic, Zvonko
AU  - Vojisavljević, Katarina
AU  - Radojković, Aleksandar
AU  - Perać, Sanja
AU  - Nikolic, Dobrica
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/778
AB  - We present magnetic properties of NiMn2O4-delta (nickel manganite) which was synthesized by complex polymerization synthesis method followed by successive heat treatment and final calcinations in air at 1200 degrees C. The sample was characterized by using X-ray powder diffractometer (XRPD), scanning electron microscopy (SEM), field-emission scanning electron microscopy (FE-SEM) and superconducting quantum interference device (SQUID) magnetometer. The XRPD and FE-SEM studies revealed NiMn2O4-delta phase and good crystallinity of particles. No other impurities have been observed by XRPD. The magnetic properties of the sample have been studied by measuring the temperature and field dependence of magnetization. Magnetic measurements of M(T) reveal rather complex magnetic properties and multiple magnetic phase transitions. We show three magnetic phase transitions with transition temperatures at T-M1 = 35 K (long-range antiferromagnetic transition), T-M2 = 101 K (antiferromagnetic-type transition) and T-M3 = 120 K (ferromagnetic-like transition). We found that the T-M1 transition is strongly dependent on the strength of the applied magnetic field (T-M1 decreases with increasing applied field) whereas the T-M3 is field independent. Otherwise, the T-M2 maximum almost disappears in higher applied magnetic fields (H = 1 kOe and 10 kOe). Magnetic measurements of M(H) show hysteretic behavior below T-M3. Moreover, hysteresis properties measured after cooling of the sample in magnetic field of 10 kOe show exchange bias effect with an exchange bias field vertical bar H-EB vertical bar= 196 Oe. In summary, the properties that distinguish the investigated NiMn2O4-delta sample from other bulk, thin film, ceramic and nanoparticle NiMn2O4-delta systems are the triple magnetic transitions with sharp increase of the ZFC and FC magnetizations at 120 K and the exchange bias effect. The analysis of the results and comparison with literature data allowed us to conjecture that the mixed oxidation states of Mn ions, ferromagnetic and antiferromagnetic sublattice orders and surface effects in the sample tailor these interesting magnetic properties.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Magnetic properties of NiMn2O4-delta (nickel manganite): Multiple magnetic phase transitions and exchange bias effect
EP  - 469
SP  - 465
VL  - 588
DO  - 10.1016/j.jallcom.2013.11.025
ER  - 

@article{
author = "Tadic, Marin M and Savić, Slavica M. and Jaglicic, Zvonko and Vojisavljević, Katarina and Radojković, Aleksandar and Perać, Sanja and Nikolic, Dobrica",
year = "2014",
abstract = "We present magnetic properties of NiMn2O4-delta (nickel manganite) which was synthesized by complex polymerization synthesis method followed by successive heat treatment and final calcinations in air at 1200 degrees C. The sample was characterized by using X-ray powder diffractometer (XRPD), scanning electron microscopy (SEM), field-emission scanning electron microscopy (FE-SEM) and superconducting quantum interference device (SQUID) magnetometer. The XRPD and FE-SEM studies revealed NiMn2O4-delta phase and good crystallinity of particles. No other impurities have been observed by XRPD. The magnetic properties of the sample have been studied by measuring the temperature and field dependence of magnetization. Magnetic measurements of M(T) reveal rather complex magnetic properties and multiple magnetic phase transitions. We show three magnetic phase transitions with transition temperatures at T-M1 = 35 K (long-range antiferromagnetic transition), T-M2 = 101 K (antiferromagnetic-type transition) and T-M3 = 120 K (ferromagnetic-like transition). We found that the T-M1 transition is strongly dependent on the strength of the applied magnetic field (T-M1 decreases with increasing applied field) whereas the T-M3 is field independent. Otherwise, the T-M2 maximum almost disappears in higher applied magnetic fields (H = 1 kOe and 10 kOe). Magnetic measurements of M(H) show hysteretic behavior below T-M3. Moreover, hysteresis properties measured after cooling of the sample in magnetic field of 10 kOe show exchange bias effect with an exchange bias field vertical bar H-EB vertical bar= 196 Oe. In summary, the properties that distinguish the investigated NiMn2O4-delta sample from other bulk, thin film, ceramic and nanoparticle NiMn2O4-delta systems are the triple magnetic transitions with sharp increase of the ZFC and FC magnetizations at 120 K and the exchange bias effect. The analysis of the results and comparison with literature data allowed us to conjecture that the mixed oxidation states of Mn ions, ferromagnetic and antiferromagnetic sublattice orders and surface effects in the sample tailor these interesting magnetic properties.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Magnetic properties of NiMn2O4-delta (nickel manganite): Multiple magnetic phase transitions and exchange bias effect",
pages = "469-465",
volume = "588",
doi = "10.1016/j.jallcom.2013.11.025"
}

Tadic, M. M., Savić, S. M., Jaglicic, Z., Vojisavljević, K., Radojković, A., Perać, S.,& Nikolic, D.. (2014). Magnetic properties of NiMn2O4-delta (nickel manganite): Multiple magnetic phase transitions and exchange bias effect. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 588, 465-469.
https://doi.org/10.1016/j.jallcom.2013.11.025

Tadic MM, Savić SM, Jaglicic Z, Vojisavljević K, Radojković A, Perać S, Nikolic D. Magnetic properties of NiMn2O4-delta (nickel manganite): Multiple magnetic phase transitions and exchange bias effect. in Journal of Alloys and Compounds. 2014;588:465-469.
doi:10.1016/j.jallcom.2013.11.025 .

Tadic, Marin M, Savić, Slavica M., Jaglicic, Zvonko, Vojisavljević, Katarina, Radojković, Aleksandar, Perać, Sanja, Nikolic, Dobrica, "Magnetic properties of NiMn2O4-delta (nickel manganite): Multiple magnetic phase transitions and exchange bias effect" in Journal of Alloys and Compounds, 588 (2014):465-469,
https://doi.org/10.1016/j.jallcom.2013.11.025 . .

TY  - JOUR
AU  - Marinković Stanojević, Zorica
AU  - Branković, Zorica
AU  - Jaglicic, Zvonko
AU  - Jagodic, M
AU  - Mančić, Lidija T
AU  - Bernik, Slavko
AU  - Recnik, Aleksander
AU  - Branković, Goran
PY  - 2011
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/463
AB  - We have studied the formation of BiMnO3 (BMO) nanocrystalline perovskite powder produced by high-energy milling of the constituent oxides. The crystal structure and the amount of crystalline and amorphous phases in the powder as a function of the milling time were determined with XRPD using Rietveld refinement. BMO perovskite formed directly from highly activated nano-sized constituent oxides after 240 min of milling and subsequently grew during prolonged milling. The morphology, structure, and chemical composition of the powder were investigated by SEM and TEM. A clear ferromagnetic transition was observed at T (C) similar to 66 K for a sample milled for 240 min and increased with milling time. The magnetic hysteresis behavior is similar to that of a soft ferromagnet. The magnetic properties of the obtained BMO powders were found to change as a function of milling time in a manner consistent with variations in the nanocomposite microstructure.
PB  - Springer, Dordrecht
T2  - Journal of Nanoparticle Research
T1  - Structural and magnetic properties of nanocrystalline bismuth manganite obtained by mechanochemical synthesis
EP  - 3439
IS  - 8
SP  - 3431
VL  - 13
DO  - 10.1007/s11051-011-0265-7
ER  - 

@article{
author = "Marinković Stanojević, Zorica and Branković, Zorica and Jaglicic, Zvonko and Jagodic, M and Mančić, Lidija T and Bernik, Slavko and Recnik, Aleksander and Branković, Goran",
year = "2011",
abstract = "We have studied the formation of BiMnO3 (BMO) nanocrystalline perovskite powder produced by high-energy milling of the constituent oxides. The crystal structure and the amount of crystalline and amorphous phases in the powder as a function of the milling time were determined with XRPD using Rietveld refinement. BMO perovskite formed directly from highly activated nano-sized constituent oxides after 240 min of milling and subsequently grew during prolonged milling. The morphology, structure, and chemical composition of the powder were investigated by SEM and TEM. A clear ferromagnetic transition was observed at T (C) similar to 66 K for a sample milled for 240 min and increased with milling time. The magnetic hysteresis behavior is similar to that of a soft ferromagnet. The magnetic properties of the obtained BMO powders were found to change as a function of milling time in a manner consistent with variations in the nanocomposite microstructure.",
publisher = "Springer, Dordrecht",
journal = "Journal of Nanoparticle Research",
title = "Structural and magnetic properties of nanocrystalline bismuth manganite obtained by mechanochemical synthesis",
pages = "3439-3431",
number = "8",
volume = "13",
doi = "10.1007/s11051-011-0265-7"
}

Marinković Stanojević, Z., Branković, Z., Jaglicic, Z., Jagodic, M., Mančić, L. T., Bernik, S., Recnik, A.,& Branković, G.. (2011). Structural and magnetic properties of nanocrystalline bismuth manganite obtained by mechanochemical synthesis. in Journal of Nanoparticle Research
Springer, Dordrecht., 13(8), 3431-3439.
https://doi.org/10.1007/s11051-011-0265-7

Marinković Stanojević Z, Branković Z, Jaglicic Z, Jagodic M, Mančić LT, Bernik S, Recnik A, Branković G. Structural and magnetic properties of nanocrystalline bismuth manganite obtained by mechanochemical synthesis. in Journal of Nanoparticle Research. 2011;13(8):3431-3439.
doi:10.1007/s11051-011-0265-7 .

Marinković Stanojević, Zorica, Branković, Zorica, Jaglicic, Zvonko, Jagodic, M, Mančić, Lidija T, Bernik, Slavko, Recnik, Aleksander, Branković, Goran, "Structural and magnetic properties of nanocrystalline bismuth manganite obtained by mechanochemical synthesis" in Journal of Nanoparticle Research, 13, no. 8 (2011):3431-3439,
https://doi.org/10.1007/s11051-011-0265-7 . .

TY  - JOUR
AU  - Branković, Zorica
AU  - Djuris, Katarina
AU  - Radojković, Aleksandar
AU  - Bernik, Slavko
AU  - Jaglicic, Zvonko
AU  - Jagodic, M
AU  - Vojisavljević, Katarina
AU  - Branković, Goran
PY  - 2010
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/378
AB  - Substituted lanthanum manganites with the general formula A(1-x) B (x) MnO3 (A = La, B = Ca, SraEuro broken vertical bar) have attracted a lot of attention due to their exceptional electric and magnetic properties. In this work, pure and Ca2+, Sr2+-doped LaMnO3 (LMO) with the concentrations of dopants 30% Ca2+ (LCMO), 30% Sr2+ (LSMO) and 15% Ca2+ + 15% Sr2+ (LCSMO) (in mol. %) were synthesized by polymerizable complex method. Bulk samples were prepared by sintering at 1300 A degrees C for 4 h in oxygen atmosphere. It was found that sintering in oxygen atmosphere enables preparation of single phase ceramics with rhombohedral crystal structure. Chemically prepared fine, submicronic precursor powders provided uniform microstructure and grain size distribution in final ceramics. As a result, pure and doped LMO ceramics with excellent microstructural and magnetic properties were obtained. Depending on the composition, magnetic measurements showed high saturation magnetizations (up to 93 emu/g), with values of the Curie temperature in the range 180-390 K and magnetoresistance up to 67%.
PB  - Springer, Dordrecht
T2  - Journal of Sol-Gel Science and Technology
T1  - Magnetic properties of doped LaMnO3 ceramics obtained by a polymerizable complex method
EP  - 316
IS  - 3
SP  - 311
VL  - 55
DO  - 10.1007/s10971-010-2251-4
ER  - 

@article{
author = "Branković, Zorica and Djuris, Katarina and Radojković, Aleksandar and Bernik, Slavko and Jaglicic, Zvonko and Jagodic, M and Vojisavljević, Katarina and Branković, Goran",
year = "2010",
abstract = "Substituted lanthanum manganites with the general formula A(1-x) B (x) MnO3 (A = La, B = Ca, SraEuro broken vertical bar) have attracted a lot of attention due to their exceptional electric and magnetic properties. In this work, pure and Ca2+, Sr2+-doped LaMnO3 (LMO) with the concentrations of dopants 30% Ca2+ (LCMO), 30% Sr2+ (LSMO) and 15% Ca2+ + 15% Sr2+ (LCSMO) (in mol. %) were synthesized by polymerizable complex method. Bulk samples were prepared by sintering at 1300 A degrees C for 4 h in oxygen atmosphere. It was found that sintering in oxygen atmosphere enables preparation of single phase ceramics with rhombohedral crystal structure. Chemically prepared fine, submicronic precursor powders provided uniform microstructure and grain size distribution in final ceramics. As a result, pure and doped LMO ceramics with excellent microstructural and magnetic properties were obtained. Depending on the composition, magnetic measurements showed high saturation magnetizations (up to 93 emu/g), with values of the Curie temperature in the range 180-390 K and magnetoresistance up to 67%.",
publisher = "Springer, Dordrecht",
journal = "Journal of Sol-Gel Science and Technology",
title = "Magnetic properties of doped LaMnO3 ceramics obtained by a polymerizable complex method",
pages = "316-311",
number = "3",
volume = "55",
doi = "10.1007/s10971-010-2251-4"
}

Branković, Z., Djuris, K., Radojković, A., Bernik, S., Jaglicic, Z., Jagodic, M., Vojisavljević, K.,& Branković, G.. (2010). Magnetic properties of doped LaMnO3 ceramics obtained by a polymerizable complex method. in Journal of Sol-Gel Science and Technology
Springer, Dordrecht., 55(3), 311-316.
https://doi.org/10.1007/s10971-010-2251-4

Branković Z, Djuris K, Radojković A, Bernik S, Jaglicic Z, Jagodic M, Vojisavljević K, Branković G. Magnetic properties of doped LaMnO3 ceramics obtained by a polymerizable complex method. in Journal of Sol-Gel Science and Technology. 2010;55(3):311-316.
doi:10.1007/s10971-010-2251-4 .

Branković, Zorica, Djuris, Katarina, Radojković, Aleksandar, Bernik, Slavko, Jaglicic, Zvonko, Jagodic, M, Vojisavljević, Katarina, Branković, Goran, "Magnetic properties of doped LaMnO3 ceramics obtained by a polymerizable complex method" in Journal of Sol-Gel Science and Technology, 55, no. 3 (2010):311-316,
https://doi.org/10.1007/s10971-010-2251-4 . .