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标题：Study of Magnetic Interactions in Dy3+ Substituted Zn0.5Mg0.5DyxFe2-xO4 Ferrites
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作者：Sahi Ram ; Shailndra Singh
期刊名称：World Journal of Chemical Education
印刷版ISSN：2375-1665
电子版ISSN：2375-1657
出版年度：2022
卷号：10
期号：2
页码：76-83
DOI：10.12691/wjce-10-2-4
语种：English
出版社：Science and Education Publishing
摘要：Rare earth dysprosium substituted spinel ferrites with a composition of Zn0.5Mg0.5DyxFe2-xO4 (x = 0.0, 0.02, 0.10 and 0.20) were synthesized by the solid-state reaction method. X-ray diffraction studies revealed the formation of single-phase cubic structures for all compositions. The lattice constant and crystallite size varied with increasing Dy3+ content in the Zn-Mg ferrite. 57Fe Mössbauer spectroscopic studies were carried out to determine the chemical state of iron, its occupancy and relative amount in tetrahedral (A) sites, octahedral (B) sites or both. The obtained value of relative amount of iron in the tetrahedral (A) site, octahedral (B) site or both was used to obtain the cation distribution at the tetrahedral (A) and octahedral (B) sites. The cation distribution was used to determine the cation-cation distances, cation-anion distances and inter-ionic bond angles to understand the spin interactions and the impact of Dy3+ ion substitution on magnetic interactions in substituted Zn-Mg ferrites.
关键词：spinel ferrite;cation distribution;Mössbauer spectroscopy;magnetic materials