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Magnetic Domain Evolution in Sintered Nd–Fe–B Magnet during Magnetization Process

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Abstract

In the present study, the magnetic domains and their evolution during magnetization process have been investigated for sintered Nd–Fe–B permanent magnets with Kerr microscopy. Observation of the magnetic domain evolution process during magnetization process shows that some domain walls were pinned at the grain boundary area under magnetic field up to 5 kOe. It is suggested that magnetic interaction between individual Nd2Fe14B grains contacting to each other leads to appearance of small closed domains near the grain boundary area, which are responsible for the pinning effect.

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Funding

This paper was supported by The National Key Research and Development Program of China (grant number: 2016YFB0700903), The National Natural Science Foundation of China (grant number: 51571126), Science research project of higher education of Inner Mongolia (NJZY17169), Innovative Science and Technology Project of Inner Mongolia(grant number: 4140300502), and Science and Technology Innovation Project of University (grant number: 2016QDL-S20).

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Authors and Affiliations

  1. Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources (KLIEBR), InnerMongolia University of Science and Technology, Baotou, 014010, China

    Qiang Ma, Xue-Feng Zhang & Yan-Li Liu

  2. School of Science, Inner Mongolia University of Science and Technology, Baotou, 014010, China

    Qiang Ma, Ze-Yu Zhang, Zhi-Feng Hu, Yan-Li Liu, Fei Liu & Xiang-Ming Ju

  3. College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China

    Qiang Ma, Ming Yue & Jiu-Xing Zhang

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  1. Qiang Ma
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  2. Ze-Yu Zhang
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  3. Zhi-Feng Hu
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  4. Xue-Feng Zhang
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  5. Ming Yue
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  6. Yan-Li Liu
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  7. Fei Liu
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  9. Jiu-Xing Zhang
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Correspondence to Xue-Feng Zhang.

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Ma, Q., Zhang, ZY., Hu, ZF. et al. Magnetic Domain Evolution in Sintered Nd–Fe–B Magnet during Magnetization Process. J Supercond Nov Magn 31, 1665–1668 (2018). https://doi.org/10.1007/s10948-018-4650-7

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  • DOI: https://doi.org/10.1007/s10948-018-4650-7

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