Macroscopic demagnetization of the sintered Nd-Fe-B magnets prepared by Tb grain boundary diffusion

被引：2

作者：

Di, Jinghui ^{[1
,2
]}

Liu, Huiqiang ^{[2
]}

Meng, Hui ^{[3
]}

Chen, Christina H. ^{[4
]}

Zou, Min ^{[5
]}

Wu, Xiongfei ^{[2
]}

Yu, Chao ^{[1
]}

Zhang, Chaoyue ^{[6
]}

Jia, Shengli ^{[2
]}

Wei, Qifeng ^{[3
]}

Zhang, Baoguo ^{[6
]}

机构：

[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Hubei, Peoples R China

[2] Hangzhou Magmax Technol Co Ltd, Hangzhou 311500, Peoples R China

[3] Zhejiang Strong Pharmaceut Co Ltd, Hangzhou 311500, Peoples R China

[4] Quadrant Solut Inc, San Jose, CA 95131 USA

[5] Lab Magnet Inc, San Jose, CA 95131 USA

[6] Hangzhou Kede Magnet Components Co Ltd, Hangzhou 311500, Peoples R China

来源：

SCRIPTA MATERIALIA | 2024年 / 247卷

基金：

中国国家自然科学基金;

关键词：

Sintered Nd-Fe-B magnets; Grain boundary diffusion; Macroscopic demagnetization; Magnetization reversal; Magnetic field distribution analysis; MAGNETIZATION REVERSAL; PERMANENT-MAGNETS;

D O I：

10.1016/j.scriptamat.2024.116113

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Macroscopic demagnetization in sintered Nd-Fe-B magnets by Tb grain boundary diffusion (GBD) is investigated in comparison with non-GBD ones. Demagnetization curves, the coercivity distributions, Tb content, and magnetic fields of the magnets at various external fields (mu 0Hext) are analyzed. As mu 0Hext approaches coercivity of the GBD magnet, S-N poles form near the center, between and parallel to the original N-S poles, indicating the magnetization reversal near the center of the GBD magnet. This is distinguished from the non-GBD magnets where demagnetization occurs mainly in the pole surfaces. The mechanism for macroscopic demagnetization is discussed.

引用

页数：5

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