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journal article·2018-01-01Open access

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

Xiaoyun Zhu, Xu Tang, Ke Pei, Yue Tian, Jinjun Liu, Weixing Xia, Jian Zhang, J. Ping Liu, Renjie Chen, Aru Yan

AIP Advances· Volume 8· Issue 1
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Source abstract

Abstract

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.
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Research context

OpenAlex topics: Magnetic Properties of Alloys · Magnetic Properties and Applications · Magnetic properties of thin films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Materials Science and Chemical Engineering, Ningbo University 1 , Ningbo 315211, People’s Republic of China

Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences 2 , Ningbo 315201, People’s Republic of China

Department of Physics, University of Texas at Arlington 3 , Arlington, TX 76019, USA

Funding

K. C. Wang Education Foundation · The National Basic Research Program of China · The National Key Research and Development Program of China · The Program for Key Science and Technology Innovation Team of Zhejiang Province

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