TY  - JOUR
AU  - Lazarević, Zorica Ž.
AU  - Jovalekic, C.
AU  - Recnik, A.
AU  - Ivanovski, Valentin N.
AU  - Milutinovic, A.
AU  - Romčević, Maja J.
AU  - Pavlović, Miodrag B.
AU  - Cekić, Božidar Đ.
AU  - Romčević, Nebojša Ž.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5357
AB  - Nickel ferrite, NiFe2O4 has been prepared by a soft mechanochemical route from mixture of (1) Ni(OH)(2) and alpha-Fe2O3 and (2) Ni(OH)(2) and Fe(OH)(3) powders in a planetary ball mill for varying duration. Soft mechanochemical reaction leading to formation of the NiFe2O4 spinel phase was followed by X-ray diffraction, Raman and infrared spectroscopy, TGA, scanning and transmission microscopy. The spinel phase formation was first observed after 4 h of milling and its formation was completed after 25 h in the both cases. The synthesized NiFe2O4 ferrite has a nanocrystalline structure with a crystallite size of about 20 and 10 nm respectively for the cases (1) and (2). The final grain size in the system (1) is about twice as large as that in the system (2), what is a consequence of different reaction paths in these two processing routes. There are five Raman and four IR active modes. Mossbauer spectroscopy studies implied on the possible cation distribution between the tetrahedral and octahedral sites in formed NiFe2O4 spinel structure. We were able to estimate the degree of inversion at most 0.82 in the case (1) and 0.66 in the case (2). (c) 2012 Elsevier Ltd. All rights reserved.
T2  - Materials Research Bulletin
T1  - Preparation and characterization of spinel nickel ferrite obtained by the soft mechanochemically assisted synthesis
VL  - 48
IS  - 2
SP  - 404
EP  - 415
DO  - 10.1016/j.materresbull.2012.10.061
ER  - 

@article{
author = "Lazarević, Zorica Ž. and Jovalekic, C. and Recnik, A. and Ivanovski, Valentin N. and Milutinovic, A. and Romčević, Maja J. and Pavlović, Miodrag B. and Cekić, Božidar Đ. and Romčević, Nebojša Ž.",
year = "2013",
abstract = "Nickel ferrite, NiFe2O4 has been prepared by a soft mechanochemical route from mixture of (1) Ni(OH)(2) and alpha-Fe2O3 and (2) Ni(OH)(2) and Fe(OH)(3) powders in a planetary ball mill for varying duration. Soft mechanochemical reaction leading to formation of the NiFe2O4 spinel phase was followed by X-ray diffraction, Raman and infrared spectroscopy, TGA, scanning and transmission microscopy. The spinel phase formation was first observed after 4 h of milling and its formation was completed after 25 h in the both cases. The synthesized NiFe2O4 ferrite has a nanocrystalline structure with a crystallite size of about 20 and 10 nm respectively for the cases (1) and (2). The final grain size in the system (1) is about twice as large as that in the system (2), what is a consequence of different reaction paths in these two processing routes. There are five Raman and four IR active modes. Mossbauer spectroscopy studies implied on the possible cation distribution between the tetrahedral and octahedral sites in formed NiFe2O4 spinel structure. We were able to estimate the degree of inversion at most 0.82 in the case (1) and 0.66 in the case (2). (c) 2012 Elsevier Ltd. All rights reserved.",
journal = "Materials Research Bulletin",
title = "Preparation and characterization of spinel nickel ferrite obtained by the soft mechanochemically assisted synthesis",
volume = "48",
number = "2",
pages = "404-415",
doi = "10.1016/j.materresbull.2012.10.061"
}

Lazarević, Z. Ž., Jovalekic, C., Recnik, A., Ivanovski, V. N., Milutinovic, A., Romčević, M. J., Pavlović, M. B., Cekić, B. Đ.,& Romčević, N. Ž.. (2013). Preparation and characterization of spinel nickel ferrite obtained by the soft mechanochemically assisted synthesis. in Materials Research Bulletin, 48(2), 404-415.
https://doi.org/10.1016/j.materresbull.2012.10.061

Lazarević ZŽ, Jovalekic C, Recnik A, Ivanovski VN, Milutinovic A, Romčević MJ, Pavlović MB, Cekić BĐ, Romčević NŽ. Preparation and characterization of spinel nickel ferrite obtained by the soft mechanochemically assisted synthesis. in Materials Research Bulletin. 2013;48(2):404-415.
doi:10.1016/j.materresbull.2012.10.061 .

Lazarević, Zorica Ž., Jovalekic, C., Recnik, A., Ivanovski, Valentin N., Milutinovic, A., Romčević, Maja J., Pavlović, Miodrag B., Cekić, Božidar Đ., Romčević, Nebojša Ž., "Preparation and characterization of spinel nickel ferrite obtained by the soft mechanochemically assisted synthesis" in Materials Research Bulletin, 48, no. 2 (2013):404-415,
https://doi.org/10.1016/j.materresbull.2012.10.061 . .

TY  - JOUR
AU  - Antić, Bratislav
AU  - Kremenović, Aleksandar S.
AU  - Jović, Nataša G.
AU  - Pavlović, Miodrag B.
AU  - Jovalekić, Čedomir
AU  - Nikolić, Aleksandar S.
AU  - Goya, Gerardo F.
AU  - Weidenthaler, C.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6946
AB  - We present a study of the structural and magnetic properties of (Mn,Fe)(3-delta)O-4 nanoparticles synthesized by soft mechanochemistry using Mn(OH)(2) x 2 H2O and Fe(OH)(3) powders as starting compounds. The resulting nanoparticles with a composition of the (Mn,Fe)(3-delta)O-4 type are found to have a core/shell structure with different Mn/Fe ratios in the core and at the surface. XPS analysis points to valences of +2, +3, and +4 for Mn and +3 for Fe at the particle surface. Combined results of XRPD, Mossbauer spectroscopy, and EDX analysis suggest that there is a deviation from stoichiometry in the nanoparticle core compared to the shell, accompanied by creation of cation polyvalence and vacancies. The value of saturation magnetization, M-S, of 73.5 emu/g at room temperature, is among the highest reported so far among nanocrystalline ferrite systems of similar composition. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3700228]
T2  - Journal of Applied Physics
T1  - Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)(3-delta)O-4 nanoparticles
VL  - 111
IS  - 7
DO  - 10.1063/1.3700228
ER  - 

@article{
author = "Antić, Bratislav and Kremenović, Aleksandar S. and Jović, Nataša G. and Pavlović, Miodrag B. and Jovalekić, Čedomir and Nikolić, Aleksandar S. and Goya, Gerardo F. and Weidenthaler, C.",
year = "2012",
abstract = "We present a study of the structural and magnetic properties of (Mn,Fe)(3-delta)O-4 nanoparticles synthesized by soft mechanochemistry using Mn(OH)(2) x 2 H2O and Fe(OH)(3) powders as starting compounds. The resulting nanoparticles with a composition of the (Mn,Fe)(3-delta)O-4 type are found to have a core/shell structure with different Mn/Fe ratios in the core and at the surface. XPS analysis points to valences of +2, +3, and +4 for Mn and +3 for Fe at the particle surface. Combined results of XRPD, Mossbauer spectroscopy, and EDX analysis suggest that there is a deviation from stoichiometry in the nanoparticle core compared to the shell, accompanied by creation of cation polyvalence and vacancies. The value of saturation magnetization, M-S, of 73.5 emu/g at room temperature, is among the highest reported so far among nanocrystalline ferrite systems of similar composition. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3700228]",
journal = "Journal of Applied Physics",
title = "Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)(3-delta)O-4 nanoparticles",
volume = "111",
number = "7",
doi = "10.1063/1.3700228"
}

Antić, B., Kremenović, A. S., Jović, N. G., Pavlović, M. B., Jovalekić, Č., Nikolić, A. S., Goya, G. F.,& Weidenthaler, C.. (2012). Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)(3-delta)O-4 nanoparticles. in Journal of Applied Physics, 111(7).
https://doi.org/10.1063/1.3700228

Antić B, Kremenović AS, Jović NG, Pavlović MB, Jovalekić Č, Nikolić AS, Goya GF, Weidenthaler C. Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)(3-delta)O-4 nanoparticles. in Journal of Applied Physics. 2012;111(7).
doi:10.1063/1.3700228 .

Antić, Bratislav, Kremenović, Aleksandar S., Jović, Nataša G., Pavlović, Miodrag B., Jovalekić, Čedomir, Nikolić, Aleksandar S., Goya, Gerardo F., Weidenthaler, C., "Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)(3-delta)O-4 nanoparticles" in Journal of Applied Physics, 111, no. 7 (2012),
https://doi.org/10.1063/1.3700228 . .

TY  - JOUR
AU  - Antić, Bratislav
AU  - Jović, Nataša G.
AU  - Pavlović, Miodrag B.
AU  - Kremenović, Aleksandar S.
AU  - Manojlović, Dragan D.
AU  - Vučinić-Vasić, Milica
AU  - Nikolić, Aleksandar S.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3921
AB  - In this paper we report results of structural, spectroscopic, and magnetic investigations of MgFe2O4 nanoparticles prepared by soft mechanochemical synthesis. MgFe2O4 nanoparticles crystallize in Fd3m space group with mixed cation distribution and reduced percentage of Fe3+ at tetrahedral (8a) sites. Discrepancy in the cation distribution compared to that in the bulk Mg-ferrite is one of the highest known. X-ray line broadening analysis reveals crystallite size and strain anisotropy. The saturation magnetization, M-sat=62 emu/g measured at 5 K is twice higher than that found in the bulk counterparts. Such high value of M-sat is attributed to the low value of cation inversion parameter (delta=0.69), to the core/shell structure of the nanoparticles and to the surface/volume ratio. Moumlssbauer spectrum collected at room temperature reveals ferrimagnetic ordering between Fe3+ ions in 8a and 16d sites, while zero-field-cooled (ZFC) and field-cooled (FC) M(T) measurements were shown superparamagnetic state above 350 K.
T2  - Journal of Applied Physics
T1  - Magnetization enhancement in nanostructured random type MgFe2O4 spinel prepared by soft mechanochemical route
VL  - 107
IS  - 4
DO  - 10.1063/1.3319563
ER  - 

@article{
author = "Antić, Bratislav and Jović, Nataša G. and Pavlović, Miodrag B. and Kremenović, Aleksandar S. and Manojlović, Dragan D. and Vučinić-Vasić, Milica and Nikolić, Aleksandar S.",
year = "2010",
abstract = "In this paper we report results of structural, spectroscopic, and magnetic investigations of MgFe2O4 nanoparticles prepared by soft mechanochemical synthesis. MgFe2O4 nanoparticles crystallize in Fd3m space group with mixed cation distribution and reduced percentage of Fe3+ at tetrahedral (8a) sites. Discrepancy in the cation distribution compared to that in the bulk Mg-ferrite is one of the highest known. X-ray line broadening analysis reveals crystallite size and strain anisotropy. The saturation magnetization, M-sat=62 emu/g measured at 5 K is twice higher than that found in the bulk counterparts. Such high value of M-sat is attributed to the low value of cation inversion parameter (delta=0.69), to the core/shell structure of the nanoparticles and to the surface/volume ratio. Moumlssbauer spectrum collected at room temperature reveals ferrimagnetic ordering between Fe3+ ions in 8a and 16d sites, while zero-field-cooled (ZFC) and field-cooled (FC) M(T) measurements were shown superparamagnetic state above 350 K.",
journal = "Journal of Applied Physics",
title = "Magnetization enhancement in nanostructured random type MgFe2O4 spinel prepared by soft mechanochemical route",
volume = "107",
number = "4",
doi = "10.1063/1.3319563"
}

Antić, B., Jović, N. G., Pavlović, M. B., Kremenović, A. S., Manojlović, D. D., Vučinić-Vasić, M.,& Nikolić, A. S.. (2010). Magnetization enhancement in nanostructured random type MgFe2O4 spinel prepared by soft mechanochemical route. in Journal of Applied Physics, 107(4).
https://doi.org/10.1063/1.3319563

Antić B, Jović NG, Pavlović MB, Kremenović AS, Manojlović DD, Vučinić-Vasić M, Nikolić AS. Magnetization enhancement in nanostructured random type MgFe2O4 spinel prepared by soft mechanochemical route. in Journal of Applied Physics. 2010;107(4).
doi:10.1063/1.3319563 .

Antić, Bratislav, Jović, Nataša G., Pavlović, Miodrag B., Kremenović, Aleksandar S., Manojlović, Dragan D., Vučinić-Vasić, Milica, Nikolić, Aleksandar S., "Magnetization enhancement in nanostructured random type MgFe2O4 spinel prepared by soft mechanochemical route" in Journal of Applied Physics, 107, no. 4 (2010),
https://doi.org/10.1063/1.3319563 . .