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Intrinsic structural distortion and exchange interactions in SmFe Cr O compounds.

作者信息

Xiang Zhongcheng, Li Wenping, Cui Yimin

机构信息

Key Laboratory of Micro-nano Measurement-Manipulation and Physics, Ministry of Education, Beihang University Beijing 100191 China

出版信息

RSC Adv. 2018 Feb 27;8(16):8842-8848. doi: 10.1039/c7ra13615c. eCollection 2018 Feb 23.

DOI:10.1039/c7ra13615c
PMID:35539835
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9078590/
Abstract

The effect of substituting different amounts of magnetic metal Fe on the magnetic properties of SmFe Cr O (0 < < 0.5) is reported here in order to probe the relation between the structural distortion and magnetism in these materials. The structural properties of the samples were characterized using X-ray diffraction with Rietveld refinements, and Raman spectroscopy carried out at ambient temperature. Magnetization data reveals the Neel temperature ( , where the Cr(Fe) ions order) increases with an increase in the average B-site ionic radius, and average Cr(Fe)-O-Cr(Fe) bond angle. By fitting the temperature dependence of the magnetic susceptibility to the Curie-Weiss law modified by the Dzyaloshinskii-Moriya (DM) interaction, the strengths of the symmetric and antisymmetric Cr(Fe)-Cr(Fe) exchange interactions ( and ) were determined. It was found that the strength of the symmetric interaction (reflected in the changes in the Neel temperature) increases with the replacement of Cr with Fe, which is ascribed to the changes in the average Cr(Fe)-O-Cr(Fe) bond angle and bond lengths. Meanwhile, the antisymmetric interaction a slightly decreases, which may be ascribed to the displacement of oxygen ions (dO) away from their "original" middle point.

摘要
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c515/9078590/daab282beb2a/c7ra13615c-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c515/9078590/610e4e915867/c7ra13615c-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c515/9078590/26ec6b5f0088/c7ra13615c-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c515/9078590/e6cf9c2699a3/c7ra13615c-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c515/9078590/f02ed3cab334/c7ra13615c-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c515/9078590/daab282beb2a/c7ra13615c-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c515/9078590/610e4e915867/c7ra13615c-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c515/9078590/26ec6b5f0088/c7ra13615c-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c515/9078590/e6cf9c2699a3/c7ra13615c-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c515/9078590/f02ed3cab334/c7ra13615c-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c515/9078590/daab282beb2a/c7ra13615c-f5.jpg

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引用本文的文献

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本文引用的文献

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