Magnetic Anisotropy Around Grain-Boundaries in Rare-Earth Magnets and Their Coercivity

被引：0

作者：

Yoshioka, Takuya ^{[1
]}

Tsuchiura, Hiroki ^{[1
]}

机构：

[1] Tohoku Univ, Dept Appl Phys, Sendai, Miyagi 9808579, Japan

来源：

JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS | 2017年 / 81卷 / 01期

关键词：

neodymium-iron-boron; first-principles calculation; crystal field theory; magnetic anisotropy; coercivity; micromagnetic simulation; FIELD;

D O I：

10.2320/jinstmet.JA201604

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Recently, several experimental studies for sintered Nd-Fe-B magnets have shown that their coercivity can be decisively affected by atomic structures around the grain boundaries in the magnets. In this article, a theoretical review is given on possible coercivity reduction mechanisms in sintered Nd-Fe-B or rare-earth based permanent magnets by focusing on the anomalous local magnetic anisotropy found for Nd ions on interfacial structures, based on first-principles calculations and an effective spin model.

引用

页码：19 / 25

页数：7

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