Analysis and simulation of magnetocrystalline anisotropy of misch metal magnets

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics Pub Date : 2025-09-01 DOI:10.1016/j.rinp.2025.108416

Jiefu Xiong , Dan Liu , Ruoshui Liu , Xin Ming , Lichen Wang , Xinqi Zheng , He Bai , Yinong Yin , Jianfeng Xi , Tongyun Zhao , Fengxia Hu , Baogen Shen

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Abstract

2:14:1-type rare earth magnets play an indispensable role in many fields such as industry, military and electrical appliances because of their excellent hard magnetic performance. The magnetocrystalline anisotropy of magnetic materials is a crucial intrinsic parameter to ensure the high coercivity of materials. However, since MM₂Fe₁₄B prepared by misch metal (MM) is difficult to form single crystals, the accurate determination of the magnetocrystalline anisotropy has become the focus of research. In this work, the anisotropy of MM₁₃Fe₈₁B₆ compound is analyzed by means of singular point detection, extrapolation line and refracted line method. The contribution of rare earth ions to the anisotropy energy and its relationship with the anisotropy coefficient were described by single-ion anisotropy fitting. When the anisotropy constant, saturation magnetic polarization intensity and temperature are in the regions of 0.06–1.22 MJ/m³, 1.651–1.658 T and 80–130 K, MM₂Fe₁₄B can maintain a relatively high anisotropy field (>7 × 10³ kA/m). The micromagnetic simulation further confirmed the roles of these parameters in the coercivity and the process of magnetic reversal. A full understanding of the anisotropy field, anisotropy constant, anisotropy coefficient and its change with temperature is conducive to the improvement of coercivity and magnetic properties of high abundance rare earth magnet materials.

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杂化金属磁体磁晶各向异性的分析与仿真

[02:14 . 1]型稀土磁体以其优异的硬磁性在工业、军事、电器等诸多领域发挥着不可缺少的作用。磁性材料的磁晶各向异性是保证材料具有高矫顽力的重要参数。然而，由于杂散金属（MM）制备的MM2Fe14B难以形成单晶，因此磁晶各向异性的准确测定成为研究的重点。本文采用奇异点检测、外推线法和折射线法分析了MM13Fe81B6化合物的各向异性。用单离子各向异性拟合方法描述了稀土离子对各向异性能量的贡献及其与各向异性系数的关系。当各向异性常数、饱和磁极化强度和温度分别为0.06 ~ 1.22 MJ/m3、1.651 ~ 1.658 T和80 ~ 130 K时，MM2Fe14B能保持较高的各向异性场（7 × 103 kA/m）。微磁仿真进一步证实了这些参数在矫顽力和磁反转过程中的作用。充分了解各向异性场、各向异性常数、各向异性系数及其随温度的变化，有利于提高高丰度稀土磁体材料的矫顽力和磁性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Results in Physics MATERIALS SCIENCE, MULTIDISCIPLINARYPHYSIC-PHYSICS, MULTIDISCIPLINARY

CiteScore

8.70

自引率

9.40%

发文量

754

审稿时长

50 days

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