Simulation of magnetization behaviours of Sm(Co,Fe,Cu,Zr)z magnet with low Cu content

被引：0
作者：
陈仁杰 [1 ,2 ]
张宏伟 [3 ]
沈保根 [3 ]
闫阿儒 [1 ]
陈立东 [2 ]
机构：
[1] Ningbo Institute of Materials Technology & Engineering,Chinese Academy of Sciences
[2] Shanghai Institute of Ceramics,Chinese Academy of Sciences
[3] State Key Laboratory of Magnetism,Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences
来源：
Chinese Physics B | 2009年 / 18卷 / 06期
关键词：
micromagnetic finite element method; microstructure; cell orientation; temperature;
D O I：
暂无
中图分类号：
TM273 [永磁材料、永久磁铁];
学科分类号：
0805 ; 080502 ; 080801 ;
摘要：
The effects of microstructure, cell orientation and temperature on magnetic properties and the coercivity mechanism in Sm(Co,Fe,Cu,Zr)z with low Cu content are studied by using the micromagnetic finite element method in this paper. The simulations of the demagnetization behaviours indicate that the pinning effect weakens gradually with the thickness of cell boundary decreasing and strengthens gradually with the cell size decreasing. Because of the intergrain exchange coupling, the coercivity mechanism is determined by the difference in magnetocrystalline anisotropy between the cell phase and the cell boundary phase. And the coercivity mechanism is related to not only the cells alignment but also temperature. With temperature increasing, a transformation of the demagnetization mechanism occurs from the domain pinning to the uniform magnetization reversal mode and the transformation temperature is about 650 K.
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收藏
页码：2582 / 2588
页数：7
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