Micromagnetic analysis of the magnetization reversal processes in Sm(Co,Cu,Fe,Zr)z magnets

被引：10

作者：

Chen, RJ ^{[1
]}

Rong, CB ^{[1
]}

Zhang, HW ^{[1
]}

He, SL ^{[1
]}

Zhang, SY ^{[1
]}

Shen, BG ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100080, Peoples R China

来源：

ACTA PHYSICA SINICA | 2004年 / 53卷 / 12期

关键词：

micromagnetics; finite-element; microstructure; magnetic properties;

D O I：

10.7498/aps.53.4341

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The influence of microstructure on magnetic properties of Sur ( Co, Cu, Fe, Zr). magnets is investigated by rmicromagnetic finite-element method. The demagnetization curves at different temperatures are also simulated. The calculated results show that the saturation polarization J(s) depends on the relative proportions of 2:17 phase and 1 :5 phase. The coercivity and the maximum energy product increase with increasing 2:17-type cell size, while they decrease with increasing width of I :5-type cell boundary. The coercivity analysis shows that the magnetization reversal in Sm( Co, Cu, Fe, Zr). magnets is mainly controlled by nucleation at cell boundary. The abnormal temperature dependence of coercivity is due to the fact that the cell boundary becomes less magnetic even nonmagnetic and the nucleation is difficult with increasing temperature.

引用

页码：4341 / 4346

页数：6

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