Melt-spun precipitation-hardened Sm2(Co, Cu, Fe, Zr)17 magnets with abnormal temperature dependence of coercivity

被引：93
|
作者：
Goll, D [1 ]
Kleinschroth, I [1 ]
Sigle, W [1 ]
Kronmüller, H [1 ]
机构：
[1] Max Planck Inst Met Forsch, D-70569 Stuttgart, Germany
来源：
APPLIED PHYSICS LETTERS | 2000年 / 76卷 / 08期
关键词：
D O I：
10.1063/1.125936
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Rapidly quenched Sm(CobalCu0.08Fe0.22Zr0.02)(8.5) (Cu-/Fe-rich) and Sm(CobalCu0.05Fe0.10Zr0.03)(8.5) (Cu-/Fe-poor) ribbons have been prepared by means of the melt-spinning technique. By applying an appropriate annealing procedure a microstructure similar to that of sintered magnets can be obtained. The energy dispersive x-ray microanalysis of the compositional dependence near the cell boundaries suggests a model for the profile of the crystal anisotropy constants responsible for the magnetic hardening. The Cu-/Fe-rich alloy shows a normal temperature dependence of coercivity with a negative temperature coefficient, but the Cu-/Fe-poor ribbons show a positive temperature coefficient in the temperature range from 400-700 K. The different temperature coefficients are discussed in terms of a pinning model. (C) 2000 American Institute of Physics. [S0003-6951(00)03908-5].
引用
收藏
页码：1054 / 1056
页数：3
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