TY  - JOUR
AU  - Kusigerski, Vladan
AU  - Marković, Dragana
AU  - Spasojević, Vojislav
AU  - Cvjetićanin, Nikola
AU  - Mitrić, Miodrag
AU  - Jugović, Dragana
AU  - Uskoković, Dragan
PY  - 2008
UR  - https://dais.sanu.ac.rs/123456789/2737
AB  - Comparative crystal structure and magnetic properties studies have been conducted on quaternary powder spinel samples LiMn1.82Cr0.18O4 obtained by two different synthesis methods, glycine-nitrate (GN) and ultrasonic spray-pyrolysis (SP). Although both samples possess the same spinel structure of the cubic space group Fd (3) over barm, their low-temperature magnetic properties display significant differences. While the SP sample undergoes only spin-glass transition at the freezing temperature T-f 20 K, the GN sample possesses more complicated low-temperature magnetic behavior of the reentrant spin-glass type with the Neel temperature TN 42K and freezing temperature Tf 22 K. High-temperature magnetic susceptibility of both samples is of the Curie-Weiss type with the effective magnetic moments in agreement with the nominal compositions. This fact together with the results of the chemical analysis discards the existence of the diversity in chemical compositions as a possible cause for the observed differences in the low-temperature magnetism. On the other hand, the crystal structure analysis done by the Rietveld refinement of the X-ray powder diffraction data points to the strong influence of the cation distribution on the ground-state magnetism of these systems. An explanation of this influence is proposed within the framework of a collective Jahn-Teller effect. (C) 2007 Elsevier B.V. All rights reserved.
T2  - Journal of Magnetism and Magnetic Materials
T1  - Ground-state magnetism of chromium-substituted LiMn2O4 spinel
SP  - 943
EP  - 949
VL  - 320
IS  - 6
DO  - 10.1016/j.jmmm.2007.09.011
UR  - https://hdl.handle.net/21.15107/rcub_dais_2737
ER  - 

@article{
author = "Kusigerski, Vladan and Marković, Dragana and Spasojević, Vojislav and Cvjetićanin, Nikola and Mitrić, Miodrag and Jugović, Dragana and Uskoković, Dragan",
year = "2008",
abstract = "Comparative crystal structure and magnetic properties studies have been conducted on quaternary powder spinel samples LiMn1.82Cr0.18O4 obtained by two different synthesis methods, glycine-nitrate (GN) and ultrasonic spray-pyrolysis (SP). Although both samples possess the same spinel structure of the cubic space group Fd (3) over barm, their low-temperature magnetic properties display significant differences. While the SP sample undergoes only spin-glass transition at the freezing temperature T-f 20 K, the GN sample possesses more complicated low-temperature magnetic behavior of the reentrant spin-glass type with the Neel temperature TN 42K and freezing temperature Tf 22 K. High-temperature magnetic susceptibility of both samples is of the Curie-Weiss type with the effective magnetic moments in agreement with the nominal compositions. This fact together with the results of the chemical analysis discards the existence of the diversity in chemical compositions as a possible cause for the observed differences in the low-temperature magnetism. On the other hand, the crystal structure analysis done by the Rietveld refinement of the X-ray powder diffraction data points to the strong influence of the cation distribution on the ground-state magnetism of these systems. An explanation of this influence is proposed within the framework of a collective Jahn-Teller effect. (C) 2007 Elsevier B.V. All rights reserved.",
journal = "Journal of Magnetism and Magnetic Materials",
title = "Ground-state magnetism of chromium-substituted LiMn2O4 spinel",
pages = "943-949",
volume = "320",
number = "6",
doi = "10.1016/j.jmmm.2007.09.011",
url = "https://hdl.handle.net/21.15107/rcub_dais_2737"
}

Kusigerski, V., Marković, D., Spasojević, V., Cvjetićanin, N., Mitrić, M., Jugović, D.,& Uskoković, D.. (2008). Ground-state magnetism of chromium-substituted LiMn2O4 spinel. in Journal of Magnetism and Magnetic Materials, 320(6), 943-949.
https://doi.org/10.1016/j.jmmm.2007.09.011
https://hdl.handle.net/21.15107/rcub_dais_2737

Kusigerski V, Marković D, Spasojević V, Cvjetićanin N, Mitrić M, Jugović D, Uskoković D. Ground-state magnetism of chromium-substituted LiMn2O4 spinel. in Journal of Magnetism and Magnetic Materials. 2008;320(6):943-949.
doi:10.1016/j.jmmm.2007.09.011
https://hdl.handle.net/21.15107/rcub_dais_2737 .

Kusigerski, Vladan, Marković, Dragana, Spasojević, Vojislav, Cvjetićanin, Nikola, Mitrić, Miodrag, Jugović, Dragana, Uskoković, Dragan, "Ground-state magnetism of chromium-substituted LiMn2O4 spinel" in Journal of Magnetism and Magnetic Materials, 320, no. 6 (2008):943-949,
https://doi.org/10.1016/j.jmmm.2007.09.011 .,
https://hdl.handle.net/21.15107/rcub_dais_2737 .

TY  - CONF
AU  - Pavlović, Vera P.
AU  - Nikolić, Maria Vesna
AU  - Spasojević, Vojislav
AU  - Blanuša, J.
AU  - Živković, Ljiljana
AU  - Stojanović, B. D.
AU  - Pavlović, Vladimir B.
AU  - Ristić, Momčilo M.
PY  - 2006
UR  - https://dais.sanu.ac.rs/123456789/11709
AB  - In this paper the influence of tribophysical activation on non-isothermal sintering of barium titanate has been investigated. BaTiO3 Powders were tribophysically activated in a planetary ball mill for 0, 60 and 120 min., pressed and non-isothermally sintered up to 1380 degrees C. Dilatometric analysis was performed in air in the temperature range from room temperature to 1380 degrees C with heating rates of 10, 20 and 30 degrees C/min. The samples were analyzed by the X-ray powder diffraction method. Investigation of the morphology of microstructure constituents was performed using the scanning electron microsocopy method. With the purpose of optimizing technological parameters the results obtained by microstructure analysis were correlated with the results of quantitative dilatometric analysis.
PB  - Durnten-Zurich : Trans Tech Publications Ltd.
C3  - Advanced Materials Forum III
T1  - The influence of tribophysical activation on non-isothermal sintering of BaTiO3 ceramics
EP  - 1570
VL  - 514-516
DO  - 10.4028/www.scientific.net/MSF.514-516.1566
UR  - https://hdl.handle.net/21.15107/rcub_dais_11709
ER  - 

@conference{
author = "Pavlović, Vera P. and Nikolić, Maria Vesna and Spasojević, Vojislav and Blanuša, J. and Živković, Ljiljana and Stojanović, B. D. and Pavlović, Vladimir B. and Ristić, Momčilo M.",
year = "2006",
abstract = "In this paper the influence of tribophysical activation on non-isothermal sintering of barium titanate has been investigated. BaTiO3 Powders were tribophysically activated in a planetary ball mill for 0, 60 and 120 min., pressed and non-isothermally sintered up to 1380 degrees C. Dilatometric analysis was performed in air in the temperature range from room temperature to 1380 degrees C with heating rates of 10, 20 and 30 degrees C/min. The samples were analyzed by the X-ray powder diffraction method. Investigation of the morphology of microstructure constituents was performed using the scanning electron microsocopy method. With the purpose of optimizing technological parameters the results obtained by microstructure analysis were correlated with the results of quantitative dilatometric analysis.",
publisher = "Durnten-Zurich : Trans Tech Publications Ltd.",
journal = "Advanced Materials Forum III",
title = "The influence of tribophysical activation on non-isothermal sintering of BaTiO3 ceramics",
pages = "1570",
volume = "514-516",
doi = "10.4028/www.scientific.net/MSF.514-516.1566",
url = "https://hdl.handle.net/21.15107/rcub_dais_11709"
}

Pavlović, V. P., Nikolić, M. V., Spasojević, V., Blanuša, J., Živković, L., Stojanović, B. D., Pavlović, V. B.,& Ristić, M. M.. (2006). The influence of tribophysical activation on non-isothermal sintering of BaTiO3 ceramics. in Advanced Materials Forum III
Durnten-Zurich : Trans Tech Publications Ltd.., 514-516.
https://doi.org/10.4028/www.scientific.net/MSF.514-516.1566
https://hdl.handle.net/21.15107/rcub_dais_11709

Pavlović VP, Nikolić MV, Spasojević V, Blanuša J, Živković L, Stojanović BD, Pavlović VB, Ristić MM. The influence of tribophysical activation on non-isothermal sintering of BaTiO3 ceramics. in Advanced Materials Forum III. 2006;514-516:null-1570.
doi:10.4028/www.scientific.net/MSF.514-516.1566
https://hdl.handle.net/21.15107/rcub_dais_11709 .

Pavlović, Vera P., Nikolić, Maria Vesna, Spasojević, Vojislav, Blanuša, J., Živković, Ljiljana, Stojanović, B. D., Pavlović, Vladimir B., Ristić, Momčilo M., "The influence of tribophysical activation on non-isothermal sintering of BaTiO3 ceramics" in Advanced Materials Forum III, 514-516 (2006),
https://doi.org/10.4028/www.scientific.net/MSF.514-516.1566 .,
https://hdl.handle.net/21.15107/rcub_dais_11709 .

TY  - JOUR
AU  - Spasojević, Vojislav
AU  - Dramićanin, Miroslav
AU  - Jokanović, Vukoman
AU  - Andrić, Željka
AU  - Blanuša, Jovan
AU  - Kusigerski, Vladan
AU  - Mitrić, Miodrag
AU  - Tadić, Marin
AU  - Kapičić, Ana
PY  - 2006
UR  - https://dais.sanu.ac.rs/123456789/280
AB  - Eu-doped silica nanoparticles with different concentrations of europium (3% 6%and 15at.%) were prepared by a hydrothermal procedure. Light scattering measurements of the silica colloids as well as TEM microscopy, revealed a narrow size distribution of the particles, ranging from 5 to 10 nm. X-Ray diffraction showed that all the powders were amorphous. Magnetic susceptibility vs. temperature measurements showed a behavior typical for Eu3+ ions, with a plateau below 60K, and an increase of the mass susceptibility with Eu concentration. The splitting of zero-field cooled (ZFC) and field-coled (FC) susceptibility branches increased with the europium concentration, indicating the presence of interparticle interactions. At temperatures below 40K, a contribution of paramagnetic impurities obeying the Curie law was observed. Heat treatment of the powders at 823K and 1073K increased the magnetic susceptibility. The appearance of a small peak at 70K indicated the presence of small quantities of ferromagnetic EuO in the powders after heating.
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Magnetic properties of nanostructured SiOo2:Eu3+ powders
SP  - 412
EP  - 420
VL  - 71
IS  - 4
DO  - 10.2298/JSC0604413S
UR  - https://hdl.handle.net/21.15107/rcub_dais_280
ER  - 

@article{
author = "Spasojević, Vojislav and Dramićanin, Miroslav and Jokanović, Vukoman and Andrić, Željka and Blanuša, Jovan and Kusigerski, Vladan and Mitrić, Miodrag and Tadić, Marin and Kapičić, Ana",
year = "2006",
abstract = "Eu-doped silica nanoparticles with different concentrations of europium (3% 6%and 15at.%) were prepared by a hydrothermal procedure. Light scattering measurements of the silica colloids as well as TEM microscopy, revealed a narrow size distribution of the particles, ranging from 5 to 10 nm. X-Ray diffraction showed that all the powders were amorphous. Magnetic susceptibility vs. temperature measurements showed a behavior typical for Eu3+ ions, with a plateau below 60K, and an increase of the mass susceptibility with Eu concentration. The splitting of zero-field cooled (ZFC) and field-coled (FC) susceptibility branches increased with the europium concentration, indicating the presence of interparticle interactions. At temperatures below 40K, a contribution of paramagnetic impurities obeying the Curie law was observed. Heat treatment of the powders at 823K and 1073K increased the magnetic susceptibility. The appearance of a small peak at 70K indicated the presence of small quantities of ferromagnetic EuO in the powders after heating.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Magnetic properties of nanostructured SiOo2:Eu3+ powders",
pages = "412-420",
volume = "71",
number = "4",
doi = "10.2298/JSC0604413S",
url = "https://hdl.handle.net/21.15107/rcub_dais_280"
}

Spasojević, V., Dramićanin, M., Jokanović, V., Andrić, Ž., Blanuša, J., Kusigerski, V., Mitrić, M., Tadić, M.,& Kapičić, A.. (2006). Magnetic properties of nanostructured SiOo2:Eu3+ powders. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 71(4), 412-420.
https://doi.org/10.2298/JSC0604413S
https://hdl.handle.net/21.15107/rcub_dais_280

Spasojević V, Dramićanin M, Jokanović V, Andrić Ž, Blanuša J, Kusigerski V, Mitrić M, Tadić M, Kapičić A. Magnetic properties of nanostructured SiOo2:Eu3+ powders. in Journal of the Serbian Chemical Society. 2006;71(4):412-420.
doi:10.2298/JSC0604413S
https://hdl.handle.net/21.15107/rcub_dais_280 .

Spasojević, Vojislav, Dramićanin, Miroslav, Jokanović, Vukoman, Andrić, Željka, Blanuša, Jovan, Kusigerski, Vladan, Mitrić, Miodrag, Tadić, Marin, Kapičić, Ana, "Magnetic properties of nanostructured SiOo2:Eu3+ powders" in Journal of the Serbian Chemical Society, 71, no. 4 (2006):412-420,
https://doi.org/10.2298/JSC0604413S .,
https://hdl.handle.net/21.15107/rcub_dais_280 .