Analysis of thermal demagnetization behavior of Nd-Fe-B sintered magnets using magnetic domain observation

被引：4
|
作者：
Takezawa, Masaaki [1 ]
Ikeda, Soichiro [1 ]
Morimoto, Yuji [1 ]
Kabashima, Hisayuki [2 ]
机构：
[1] Kyushu Inst Technol, Fac Engn, Dept Appl Sci Integrated Syst Engn, Tobata Ku, 1-1 Sensui Cho, Kitakyushu, Fukuoka 8048550, Japan
[2] Mazda Motor Corp, 3-1 Shinchi, Fuchu, Hiroshima 7308670, Japan
来源：
AIP ADVANCES | 2016年 / 6卷 / 05期
关键词：
D O I：
10.1063/1.4944402
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We used magnetic domain observation to statistically observe the thermal demagnetization behavior of Nd-Fe-B sintered magnets at elevated temperatures up to 150 degrees C. Simultaneous magnetization reversal in a hundred adjacent grains occurred at 90 degrees C because of the magnetic interaction among the grains beyond grain boundaries in the Dysprosium (Dy)-free low-coercivity magnet. Conversely, simultaneous magnetization reversal in a hundred grains did not occur in the Dy-added high-coercivity magnets, and the demagnetizing ratio steadily increased with temperature. Furthermore, the addition of Dy induced high thermal stability by eliminating the simultaneous thermal demagnetization, which was caused by the magnetic interaction among the grains. (C) 2016 Author(s).
引用
收藏
页数：8
相关论文
共 50 条
  • [1] Analysis of the demagnetization process of Nd-Fe-B sintered magnets at elevated temperatures by magnetic domain observation using a Kerr microscope
    Takezawa, M.
    Ogimoto, H.
    Kimura, Y.
    Morimoto, Y.
    JOURNAL OF APPLIED PHYSICS, 2014, 115 (17)
  • [2] Magnetic Domain Observation of Nd-Fe-B Sintered Magnets at Elevated Temperatures by Using Kerr Microscope
    Takezawa, Masaaki
    Nagashima, Yuki
    Morimoto, Yuji
    Yamasaki, Jiro
    IEEE TRANSACTIONS ON MAGNETICS, 2011, 47 (10) : 3256 - 3258
  • [3] Demagnetization Process of Nd-Fe-B Sintered and Ferrite Magnets
    Matsuura, Yutaka
    IEEJ Transactions on Electrical and Electronic Engineering,
  • [4] Demagnetization Process of Nd-Fe-B Sintered and Ferrite Magnets
    Matsuura, Yutaka
    IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING, 2025,
  • [5] Analysis of Magnetization Reversal Process of Nd-Fe-B Sintered Magnets by Magnetic Domain Observation Using Kerr Microscope
    Takezawa, Masaaki
    Kimura, Yuya
    Morimoto, Yuji
    Yamasaki, Jiro
    IEEE TRANSACTIONS ON MAGNETICS, 2013, 49 (07) : 3262 - 3264
  • [6] Angular dependence of the demagnetization stability of sintered Nd-Fe-B magnets
    Katter, M
    IEEE TRANSACTIONS ON MAGNETICS, 2005, 41 (10) : 3853 - 3855
  • [7] Dependence of the demagnetization behavior on the direction of grain boundary diffusion in sintered Nd-Fe-B magnets
    Chen, Fugang
    Zhang, Tieqiao
    Zhang, Wenhao
    Zhang, Lanting
    Jin, Yunxue
    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2018, 465 : 392 - 398
  • [8] MAGNETIC AFTEREFFECT OF ND-FE-B SINTERED MAGNETS
    NISHIO, H
    IEEE TRANSACTIONS ON MAGNETICS, 1988, 24 (06) : 3188 - 3192
  • [9] MAGNETIC VISCOSITY IN ND-FE-B SINTERED MAGNETS
    GIVORD, D
    LIENARD, A
    TENAUD, P
    VIADIEU, T
    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1987, 67 (03) : L281 - L285
  • [10] Corrosion Behavior of Sintered Nd-Fe-B Magnets
    Li Hongying
    Hao Zhuangzhi
    Liu Yuhui
    Zhu Wangwei
    Chen Yunzhi
    Duan Junying
    RARE METAL MATERIALS AND ENGINEERING, 2018, 47 (05) : 1451 - 1458
12345