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

被引：92

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

页码：1054 / 1056

页数：3

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