Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)(3-delta)O-4 nanoparticles
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Antić, BratislavKremenović, Aleksandar
Jovic, N.
Pavlović, Miodrag B.
Jovalekic, C.
Nikolić, Aleksandar S.
Goya, G. F.
Weidenthaler, C.
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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]
Source:
Journal of Applied Physics, 2012, 111, 7Publisher:
- Amer Inst Physics, Melville
Funding / projects:
- Magnetic and radionuclide labeled nanostructured materials for medical applications (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45015)
DOI: 10.1063/1.3700228
ISSN: 0021-8979
WoS: 000303282402132
Scopus: 2-s2.0-84861740640
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Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Antić, Bratislav AU - Kremenović, Aleksandar AU - Jovic, N. AU - Pavlović, Miodrag B. AU - Jovalekic, C. AU - Nikolić, Aleksandar S. AU - Goya, G. F. AU - Weidenthaler, C. PY - 2012 UR - https://cherry.chem.bg.ac.rs/handle/123456789/1285 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] PB - Amer Inst Physics, Melville 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 and Jovic, N. and Pavlović, Miodrag B. and Jovalekic, C. and Nikolić, Aleksandar S. and Goya, G. 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]", publisher = "Amer Inst Physics, Melville", 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., Jovic, N., Pavlović, M. B., Jovalekic, C., 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 Amer Inst Physics, Melville., 111(7). https://doi.org/10.1063/1.3700228
Antić B, Kremenović A, Jovic N, Pavlović MB, Jovalekic C, 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, Jovic, N., Pavlović, Miodrag B., Jovalekic, C., Nikolić, Aleksandar S., Goya, G. 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 . .