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

• Authors: Zbigniew Surowiec , Marek Wiertel , Wojciech Gac , Mieczysław Budzyński
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

manganese ferrite; MCM-41 porous silica; Mössbauer effect; superparamagnetic nanoparticles

• Publisher: De Gruyter Open
• Journal: Nukleonika
• Year: 2015
• Volume: 60
• Issue: 1
• Pages: 137-141

Dates

published

1 - 3 - 2015

online

12 - 3 - 2015

accepted

18 - 11 - 2014

received

18 - 6 - 2014

Contributors

author

Zbigniew Surowiec

• Institute of Physics, M. Curie-Skłodowska University, 1 M. Curie-Skłodowskiej Sq., 20-031 Lublin, Poland, Tel.: [phone], Fax: [phone]

author

Marek Wiertel

• Institute of Physics, M. Curie-Skłodowska University, 1 M. Curie-Skłodowskiej Sq., 20-031 Lublin, Poland, Tel.: [phone], Fax: [phone]

author

Wojciech Gac

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

author

Mieczysław Budzyński

• Institute of Physics, M. Curie-Skłodowska University, 1 M. Curie-Skłodowskiej Sq., 20-031 Lublin, Poland, Tel.: [phone], Fax: [phone]

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Identifiers

DOI

10.1515/nuka-2015-0029