中国物理B ›› 2013, Vol. 22 ›› Issue (7): 74101-074101.doi: 10.1088/1674-1056/22/7/074101

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Experiment research on residual magnetization of rare earth permanent magnet for cryogenic undulator

何永周   

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
  • 收稿日期:2012-12-05 修回日期:2013-01-18 出版日期:2013-06-01 发布日期:2013-06-01
  • 基金资助:
    Project supported by the Natural Science Foundation of Shanghai, China (Grant No. 11ZR1445500) and the National Natural Science Foundation of China (Grant No. 11175238).

Experiment research on residual magnetization of rare earth permanent magnet for cryogenic undulator

He Yong-Zhou (何永周)   

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
  • Received:2012-12-05 Revised:2013-01-18 Online:2013-06-01 Published:2013-06-01
  • Contact: He Yong-Zhou E-mail:heyongzhou@sinap.ac.cn
  • Supported by:
    Project supported by the Natural Science Foundation of Shanghai, China (Grant No. 11ZR1445500) and the National Natural Science Foundation of China (Grant No. 11175238).

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摘要： The magnetic properties of commercial polycrystalline Nd2Fe14B (N50M, N45H, N40SH, N35EH) and Sm2Co17 (XG30/20, XG26/25, XG22/20) magnets at cryogenic temperatures were tested by using a comprehensive physical properties measurement system (PPMS). The results show that spin tilt temperature Tst of Nd2Fe14B magnets is closely related to intrinsic coercivity Hci, N50M and N45H with smaller Hci show a residual magnetization jump at 235 K and 225 K, respectively. For Sm2Co17 magnets, in 50-300 K, with temperature decreasing, residual magnetization Mrc shows a nearly linear increase, while in 10-50 K, Mrc has little change. The research results provide a reference for cryogenic undulators and other high-precision cryogenic devices.

关键词: Nd2Fe14B and Sm2Co17, spin reorientation, residual magnetization, intrinsic coercivity

Abstract: The magnetic properties of commercial polycrystalline Nd2Fe14B (N50M, N45H, N40SH, N35EH) and Sm2Co17 (XG30/20, XG26/25, XG22/20) magnets at cryogenic temperatures were tested by using a comprehensive physical properties measurement system (PPMS). The results show that spin tilt temperature Tst of Nd2Fe14B magnets is closely related to intrinsic coercivity Hci, N50M and N45H with smaller Hci show a residual magnetization jump at 235 K and 225 K, respectively. For Sm2Co17 magnets, in 50-300 K, with temperature decreasing, residual magnetization Mrc shows a nearly linear increase, while in 10-50 K, Mrc has little change. The research results provide a reference for cryogenic undulators and other high-precision cryogenic devices.

Key words: Nd2Fe14B and Sm2Co17, spin reorientation, residual magnetization, intrinsic coercivity

中图分类号:  (Synchrotron radiation)

  • 41.60.Ap
41.85.Lc (Particle beam focusing and bending magnets, wiggler magnets, and quadrupoles) 75.50.Ww (Permanent magnets)