<abstract xmlns="http://www.w3.org/1999/xhtml">Nanoparticles of manganese ferrite were obtained by the impregnation of highly ordered mesoporous MCM-41 silica support. The investigated sample contained 20% wt. Fe. The obtained nanocrystallites were strongly dispersed in silica matrix and their size was about 2 nm. The sample annealing at 500°C led to increase of particle size to about 5 nm. The Mössbauer spectroscopy investigations performed at room temperature show on occurrence of MnFe2O4 nanoparticle in superparamagnetic state for the sample annealed in all temperatures. The coexistence of superparamagnetic and ferromagnetic phase was observed at liquid nitrogen temperature. The sample annealed at 400°C and 500°C has bigger manganese ferrite particle and better crystallized structure. One can assign them the discrete hyperfine magnetic field components.</abstract>

Nanoparticles of manganese ferrite were obtained by the impregnation of highly ordered mesoporous MCM-41 silica support. The investigated sample contained 20% wt. Fe. The obtained nanocrystallites were strongly dispersed in silica matrix and their size was about 2 nm. The sample annealing at 500°C led to increase of particle size to about 5 nm. The Mössbauer spectroscopy investigations performed at room temperature show on occurrence of MnFe2O4 nanoparticle in superparamagnetic state for the sample annealed in all temperatures. The coexistence of superparamagnetic and ferromagnetic phase was observed at liquid nitrogen temperature. The sample annealed at 400°C and 500°C has bigger manganese ferrite particle and better crystallized structure. One can assign them the discrete hyperfine magnetic field components.

Influence of annealing temperature on structural and magnetic properties of MnFe2O4 nanoparticles

Institute of Physics, M. Curie-Skłodowska University, 1 M. Curie-Skłodowskiej Sq., 20-031 Lublin, Poland, Tel.: +48 81 537 62 20, Fax: +48 537 61 91

Department of Chemical Technology, Faculty of Chemistry, M. Curie-Skłodowska University, 3 M. Curie-Skłodowskiej Sq., 20-031 Lublin, Poland

Nukleonika

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Influence of annealing temperature on structural and magnetic properties of MnFeO nanoparticles

Nanoparticles of manganese ferrite were obtained by the impregnation of highly ordered mesoporous MCM-41 silica support. The investigated sample contained 20%...

Influence of annealing temperature on structural and magnetic properties of MnFe₂O₄ nanoparticles

Published Online: Mar 12, 2015

Page range: 137 - 141

Received: Jun 18, 2014

Accepted: Nov 18, 2014

DOI: https://doi.org/10.1515/nuka-2015-0029

Keywords
manganese ferrite, MCM-41 porous silica, Mössbauer effect, superparamagnetic nanoparticles

© Zbigniew Surowiec, Marek Wiertel, Wojciech Gac, Mieczysław Budzyński

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Influence of annealing temperature on structural and magnetic properties of MnFe2O4 nanoparticles

Published Online: Mar 12, 2015

Page range: 137 - 141

Received: Jun 18, 2014

Accepted: Nov 18, 2014

DOI: https://doi.org/10.1515/nuka-2015-0029

Keywordsmanganese ferrite, MCM-41 porous silica, Mössbauer effect, superparamagnetic nanoparticles

© Zbigniew Surowiec, Marek Wiertel, Wojciech Gac, Mieczysław Budzyński

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Influence of annealing temperature on structural and magnetic properties of MnFe₂O₄ nanoparticles

Keywords
manganese ferrite, MCM-41 porous silica, Mössbauer effect, superparamagnetic nanoparticles