Direct observation of magnetization reversal of hot-deformed Nd-Fe-B magnet

被引：20
作者：
Zhu, Xiaoyun [1 ,2 ]
Tang, Xu [2 ]
Pei, Ke [1 ,2 ]
Tian, Yue [2 ]
Liu, Jinjun [1 ]
Xia, Weixing [2 ]
Zhang, Jian [2 ]
Liu, J. Ping [2 ,3 ]
Chen, Renjie [2 ]
Yan, Aru [2 ]
机构：
[1] Ningbo Univ, Inst Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China
[3] Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA
来源：
AIP ADVANCES | 2018年 / 8卷 / 01期
关键词：
COERCIVITY; DIFFUSION; ALLOY; MICROSTRUCTURE;
D O I：
10.1063/1.5005961
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The dynamic magnetic domain structure in magnetization and demagnetization process of hot-deformed and NdCu-diffused Nd2Fe14B magnets were in-situ observed by Lorentz transmission electron microscopy (LTEM). The demagnetization process of hot-deformed sample is dominated by domain-wall pinning, while that of NdCu-diffused sample is mainly the magnetization reversal of single grains or grain aggregations. This firstly observed result gives an explicit evidence to understand the coercivity mechanism of magnetically segregated magnet. The effect of magnetic field of TEM on decrease in domain wall energy was theoretically analyzed, which helps to understand the in-situ observation process of magnetic materials. (c) 2018 Author(s).
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页数：8
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