Change in Magnetic Domain Structure of Nd‐Fe‐B Sintered Magnets by Compressive Stress
作者: MASAAKI TAKEZAWAYUJI MORIMOTOJUN EJIMAYOSHIKAZU NAKANOTAKESHI ARAKI
作者单位: 1Faculty of Engineering Kyushu Institute of Technology Japan
2 Advanced Technology R&D Center Mitsubishi Electric Co. Japan
刊名: Electrical Engineering in Japan, 2018, Vol.203 (1), pp.9-17
来源数据库: Wiley Journal
DOI: 10.1002/eej.23058
关键词: Nd‐Fe‐Bmagnetic domainKerr effectcompressive stressdemagnetization
原始语种摘要: SUMMARY(#br)To clarify the relationship between compressive stresses and demagnetization of Nd‐Fe‐B sintered magnets, we have examined the change in domain configuration by compressive stresses using a Kerr microscope. The magnetic domains of five kinds of Nd‐Fe‐B sintered magnets have been observed. The magnets have a coercivity of 0.8 MA/m to 1.4 MA/m and residual magnetic flux density of 1.3 T to 1.5 T. Irreversible demagnetization of Nd‐Fe‐B magnets with a low coercivity of 0.875 MA/m and high residual magnetic flux density of 1.41 T to 1.47 T have occurred from applying a compressive stress of 100 MPa. The compression‐affected area is approximately 0.14%. The stress more than 50 MPa is needed to demagnetize Nd‐Fe‐B magnets. The amount of irreversible demagnetization depends upon the...
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关键词翻译
关键词翻译
  • coercivity 矫顽性
  • demagnetize 去磁
  • compressive 压缩的
  • coercive 矫顽磁性
  • sintered 烧结的
  • Fe ferrum
  • density 密度
  • magnetic 磁的
  • irreversible 不可逆的
  • stress 应力