Long relaxation phenomena studied by measurements of dynamic susceptibility in a weak random anisotropy magnet

被引：6

作者：

Saito, T ^{[1
]}

Suto, A ^{[1
]}

Takenaka, S ^{[1
]}

机构：

[1] Toho Univ, Dept Phys, Chiba 2748510, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷

关键词：

Weak random anisotropy; spin glasses; phase transition; dynamic susceptibility; long relaxation;

D O I：

10.1016/j.jmmm.2003.12.094

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigated characteristic dynamical properties of a weak random anisotropy magnet by measuring AC susceptibility chi*(omega) of a-Ho28Fe72 thin film: (i) the imaginary part (Im chi) of chi*(omega) is larger than the real part (Rechi) at measuring frequency range (from 35 Hz to 1.4 kHz) at around the transition temperature T-c, (ii) a "dip" in Rechi at about T-c in the frequency range higher than 870 Hz is observed, which suggests a critical relaxation and (iii) by using the Cole-Cole analysis, it is found that the distribution of relaxation time broadens drastically around T-c. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：1319 / 1320

页数：2

共 8 条

[1] Dynamic susceptibility of a strong random anisotropy magnet [J].