Magnetic relaxation in disordered exchange interacting systems with random anisotropy

被引：1
|
作者：
Mao, Zhongquan [1 ]
Chen, Xi [1 ]
机构：
[1] S China Univ Technol, Dept Phys, Guangzhou 510640, Guangdong, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2010年 / 150卷 / 45-46期
基金：
中国国家自然科学基金;
关键词：
Magnetic nanoparticles; Superferromagnetism; Relaxation; Monte Carlo simulation; FERROMAGNETIC NANOPARTICLES; FILMS;
D O I：
10.1016/j.ssc.2010.09.038
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The magnetic relaxation of the disordered exchange interacting random anisotropy systems is investigated based on the Monte Carlo method Similar to the dipolar interacting systems [M Ulrich J Garcia-Otero J Rivas A Bunde Phys Rev B 67 (2003) 024416] the logarithmic relaxation rate decays by a universal power law W(t) = At-n The exponent n increases monotonically with the decreasing temperature as well as the increasing exchange interaction Depending on the value of n short-range ferromagnetic correlations (or spin-glass-like behaviour) and superferromagnetic order are suggested (C) 2010 Elsevier Ltd All rights reserved
引用
收藏
页码：2227 / 2230
页数：4
相关论文
共 50 条
12345