PHYSICO-CHEMICAL PROPERTIES OF MAGNETIC Mg1–xZnxFe2O4 NANOPARTICLES PREPARED BY DIFFERENT METHODS
Abstract
Superparamagnetic ferrite nanoparticles in the system of MgxZn1–xFe2O4 (х = 0.25; 0.5; 0.7) have been prepared by coprecipitation, spray pyrolysis and the nitrate-citrate approach. The dependence of the phase composition, morphology and magnetic
properties of the nanoparticles on their chemical composition and synthesis conditions have been studied. The crystallinity degree and particle size tend to increase with the increase of the synthesis temperature and duration. The saturation magnetization of the nanoparticles increase as well due to cation redistribution between spinel structure sublattices, which is accompanied by reduction of the inversion degree. In the case of spray pyrolysis method, the correlation between saturation magnetization and ferrite composition is weak, while for coprecipitation and the nitrate-citrate approach it goes through a maximum. The highest saturation magnetization of 30 а∙m2∙kg–1 relates to kg0,5Zn0,5Fe2O4 sample obtained by the nitrate-citrate approach.
properties of the nanoparticles on their chemical composition and synthesis conditions have been studied. The crystallinity degree and particle size tend to increase with the increase of the synthesis temperature and duration. The saturation magnetization of the nanoparticles increase as well due to cation redistribution between spinel structure sublattices, which is accompanied by reduction of the inversion degree. In the case of spray pyrolysis method, the correlation between saturation magnetization and ferrite composition is weak, while for coprecipitation and the nitrate-citrate approach it goes through a maximum. The highest saturation magnetization of 30 а∙m2∙kg–1 relates to kg0,5Zn0,5Fe2O4 sample obtained by the nitrate-citrate approach.
About the Authors
E. G. Petrova
Belarusian State University
Belarus
M. Sc. (Chemistry), Ph. D. student
Belarus
M. Sc. (Chemistry), Ph. D. student
D. A. Kotsikau
Belarusian State University
Belarus
Ph. D. (Chemistry), Associate Professor, assistant professor
Belarus
Ph. D. (Chemistry), Associate Professor, assistant professor
V. O. Natarov
Belarusian State University
Belarus
Master student
Belarus
Master student
V. V. Pankov
Belarusian State University
Belarus
D. Sc. (Chemistry), P rofessor, Head of the Physical Chemistry Department
Belarus
D. Sc. (Chemistry), P rofessor, Head of the Physical Chemistry Department
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