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.
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页码：2583 / 2586
页数：4
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