Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)(3-delta)O-4 nanoparticles
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Antić, BratislavKremenović, Aleksandar S.
Jović, Nataša G.
Pavlović, Miodrag B.
Jovalekić, Čedomir
Nikolić, Aleksandar S.
Goya, Gerardo 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]
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Journal of Applied Physics, 2012, 111, 7Funding / projects:
- Magnetic and radionuclide labeled nanostructured materials for medical applications (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45015)
Note:
- 56th Annual Conference on Magnetism and Magnetic Materials, Oct 30-30, 2011, Scottsdale, AZ
DOI: 10.1063/1.3700228
ISSN: 0021-8979; 1089-7550
WoS: 000303282402132
Scopus: 2-s2.0-84861740640
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VinčaTY - 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 . .