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
收藏
页码：19 / 25
页数：7
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