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Proceedings of the National Academy of Sciences of Belarus, Chemical Series

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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.
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ISSN 1561-8331 (Print)
ISSN 2524-2342 (Online)