Micromagnetic investigation by a simplified approach on the demagnetization field of permanent magnets with nonmagnetic phase inside
Micromagnetic investigation by a simplified approach on the demagnetization field of permanent magnets with nonmagnetic phase inside
复制标题
采用简化方法对内部非磁性相永磁体退磁场进行微磁研究
DOI：
10.1007/s11706-019-0471-2
复制
发表时间：
2019-09
影响因子：
2.7
通讯作者：
Liu Zhongwu
中科院分区：
文献类型：
--
作者：
Li Wei;Zhao Lizhong;Liu Zhongwu
提出了一种基于微磁仿真的简化分析方法来研究非磁性颗粒对永磁体退磁场的影响。利用退磁场的可加性定律，只需关注备用磁体的杂散场，就可以分析真实磁体的复杂退磁场。对于内部含有非磁性颗粒的磁体，颗粒大小对消磁场的最大值没有显著影响，但颗粒影响区域的面积与颗粒大小成正比。大颗粒产生的影响面积与受其他颗粒影响的影响面积重叠，从而导致大的退磁场。随着粒子沿磁化方向长度的增加，磁极表面的退磁场增大。磁极表面呈凸形会增大退磁场。靠近磁极表面的宏观大退磁场将进一步增大非磁性颗粒附近的退磁场。这项工作为优化永磁体的微观结构提供了一些实用的方法。
A simplified analysis method based on micromagnetic simulation is proposed to investigate effects of nonmagnetic particles on the demagnetizing field of a permanent magnet. By applying the additivity law of the demagnetizing field, the complicated demagnetizing field of the real magnet could be analyzed by only focusing on the stray field of the reserved magnet. For a magnet with nonmagnetic particles inside, the particle size has no significant effect on the maximum value of the demagnetization field, but the area of the affected region by the particle is proportional to the particle size. A large particle produces a large affected area overlapped with those influenced by other particles, which leads to the large demagnetization field. With increasing the length of the particle along the magnetization direction, the demagnetization field on the pole surface increases. The pole surface with a convex shape will increase the demagnetization field. The demagnetizing field near the nonmagnetic particle will be further increased by the large macroscopic demagnetizing field near the pole surface. This work suggests some practical approaches to optimize the microstructure of permanent magnets.
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影响因子：
2.7
作者：
F. Vial;F. Joly;E. Nevalainen;M. Sagawa;K. Hiraga;K. T. Park
通讯作者：
F. Vial;F. Joly;E. Nevalainen;M. Sagawa;K. Hiraga;K. T. Park
DOI：
10.1109/20.800483
发表时间：
1999-05
期刊：
IEEE International Magnetics Conference
影响因子：
--
作者：
T. Schrefl;J. Fidler
通讯作者：
T. Schrefl;J. Fidler
影响因子：
2.1
作者：
M. Donahue
通讯作者：
M. Donahue
影响因子：
6
作者：
Woodcock, T. G.;Zhang, Y.;Givord, D.
通讯作者：
Givord, D.
影响因子：
6
作者：
Chen, Fugang;Zhang, Tieqiao;Zhou, Gaofeng
通讯作者：
Zhou, Gaofeng