LINEAR AND NONLINEAR SUSCEPTIBILITIES IN CU97CO3 ALLOY FOR FERROMAGNETIC FINE PARTICLES IN METALLIC MATRIX - COMPARISON WITH SPIN-GLASS AU96FE4 ALLOY

被引：31

作者：

BITOH, T

OHBA, K

TAKAMATSU, M

SHIRANE, T

CHIKAZAWA, S

机构：

[1] Department of Applied Materials Science, Muroran Institute of Technology, Muroran 050

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1993年 / 62卷 / 08期

关键词：

COBALT FINE PARTICLES; AC SUSCEPTIBILITY; NONLINEAR SUSCEPTIBILITY; BLOCKING OF SUPERPARAMAGNETIC PARTICLES; SPIN GLASS;

D O I：

10.1143/JPSJ.62.2583

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ac linear (chi0) and nonlinear (chi2) susceptibilities of ferromagnetic fine cobalt particles, which were precipitated in a Cu97Co3 alloy, have been studied. The linear susceptibility chi0 has a spin-glass-like maximum at low temperature. The nonlinear susceptibility chi2 is negative and has a peak around the temperature where chi0 exhibits the maximum. However, the negative peak in chi2 is very broad compared with that of spin glasses. Furthermore, chi2 is proportional to T-3 at high temperatures. This behavior of chi2 in the Cu97Co3 alloy is essentially different from the divergent behavior of chi2 in spin glasses.

引用

页码：2583 / 2586

页数：4

共 23 条

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