中国物理B ›› 2024, Vol. 33 ›› Issue (3): 37507-037507.doi: 10.1088/1674-1056/ad1d4c

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Coercivity mechanism of La-Nd-Fe-B films with Y spacer layer

Jun Ma(马俊)1,2, Xiao-Tian Zhao(赵晓天)1,†, Wei Liu(刘伟)1,‡, Yang Li(李阳)1,2, Long Liu(刘龙)1,2, Xin-Guo Zhao(赵新国)1, and Zhi-Dong Zhang(张志东)1   

  1. 1 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
    2 School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
  • 收稿日期:2023-11-17 修回日期:2023-12-31 接受日期:2024-01-11 出版日期:2024-02-22 发布日期:2024-02-22
  • 通讯作者: Xiao-Tian Zhao, Wei Liu E-mail:xtzhao@imr.ac.cn;wliu@imr.ac.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2021YFB3500303) and the National Natural Science Foundation of China (Grant Nos. 52031014 and 51971219).

Coercivity mechanism of La-Nd-Fe-B films with Y spacer layer

Jun Ma(马俊)1,2, Xiao-Tian Zhao(赵晓天)1,†, Wei Liu(刘伟)1,‡, Yang Li(李阳)1,2, Long Liu(刘龙)1,2, Xin-Guo Zhao(赵新国)1, and Zhi-Dong Zhang(张志东)1   

  1. 1 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
    2 School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
  • Received:2023-11-17 Revised:2023-12-31 Accepted:2024-01-11 Online:2024-02-22 Published:2024-02-22
  • Contact: Xiao-Tian Zhao, Wei Liu E-mail:xtzhao@imr.ac.cn;wliu@imr.ac.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2021YFB3500303) and the National Natural Science Foundation of China (Grant Nos. 52031014 and 51971219).

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摘要： The effect of the Y spacer layer on the phase composition, coercivity, and magnetization reversal processes of La-Nd-Fe-B films has been investigated. The addition of a 10 nm Y spacer layer increases the coercivity of the film to 1.36 T at 300 K and remains 0.938 T at 380 K. As the thickness of the Y spacer layer increases, Y participates in the formation of the main phase in the film, and further regulates the formation of La-B phases. The results of the first-order reversal curve (FORC) and micromagnetic fitting show that the coercivity of all the films is dominated by nucleation mechanism. The c-axis preferred orientation, good magnetic microstructure parameters and the largest dipole interaction enhance the coercivity. Therefore, the introduction of the Y spacer layer can be an effective way to improve the coercivity of La-Nd-Fe-B film over a wide temperature range of 150 K-380 K.

关键词: La-Nd-(Y)-Fe-B films, magnetization reversal mechanisms, coercivity, multilayers

Abstract: The effect of the Y spacer layer on the phase composition, coercivity, and magnetization reversal processes of La-Nd-Fe-B films has been investigated. The addition of a 10 nm Y spacer layer increases the coercivity of the film to 1.36 T at 300 K and remains 0.938 T at 380 K. As the thickness of the Y spacer layer increases, Y participates in the formation of the main phase in the film, and further regulates the formation of La-B phases. The results of the first-order reversal curve (FORC) and micromagnetic fitting show that the coercivity of all the films is dominated by nucleation mechanism. The c-axis preferred orientation, good magnetic microstructure parameters and the largest dipole interaction enhance the coercivity. Therefore, the introduction of the Y spacer layer can be an effective way to improve the coercivity of La-Nd-Fe-B film over a wide temperature range of 150 K-380 K.

Key words: La-Nd-(Y)-Fe-B films, magnetization reversal mechanisms, coercivity, multilayers

中图分类号:  (Magnetization reversal mechanisms)

  • 75.60.Jk
75.70.-i (Magnetic properties of thin films, surfaces, and interfaces) 75.50.Vv (High coercivity materials)