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

页码：2227 / 2230

页数：4

共 50 条

[21] Magnetic relaxation measurements of exchange biased (Pt/Co) multilayers with perpendicular anisotropy
F. Romanens
S. Pizzini
J. Sort
F. Garcia
J. Camarero
F. Yokaichiya
Y. Pennec
J. Vogel
B. Dieny
The European Physical Journal B - Condensed Matter and Complex Systems, 2005, 45 : 185 - 190
[22] Magnetoresistance and local magnetic order in random anisotropy ferromagnetic systems
Amaral, V.S., 1600, Publ by Elsevier Science Publishers B.V., Amsterdam, Netherlands (194-96):
[23] MAGNETORESISTANCE AND LOCAL MAGNETIC ORDER IN RANDOM ANISOTROPY FERROMAGNETIC SYSTEMS
AMARAL, VS
SOUSA, JB
MOREIRA, JM
BARBARA, B
FILIPPI, J
JANSEN, AGM
PHYSICA B, 1994, 194 : 315 - 316
[24] EFFECT OF RANDOM ANISOTROPY ON MAGNETIC-PROPERTIES OF AMORPHOUS SYSTEMS
PATTERSON, JD
GRUZALSKI, GR
SELLMYER, DJ
PHYSICAL REVIEW B, 1978, 18 (03): : 1377 - 1390
[25] HOMOGENEOUS RELAXATION IN FERROMAGNETS WITH ANISOTROPY EXCHANGE
KASHCHEEV, VN
FIZIKA TVERDOGO TELA, 1976, 18 (04): : 1172 - 1174
[26] Nuclear magnetic dipolar relaxation in disordered metal-hydrogen systems
Adnani, N.
Titman, J.M.
Journal of the less-common metals, 1991, 173 (1-2): : 579 - 584
[27] Levy field distributions and anomalous spin relaxation in disordered magnetic systems
Maass, P
Scheffler, F
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 2002, 314 (1-4) : 200 - 207
[28] Importance of the anisotropic exchange interaction for the magnetic anisotropy of polymetallic systems
Piligkos, Stergios
Bill, Eckhard
Collison, David
McInnes, Eric J. L.
Timco, Grigore A.
Weihe, Hogni
Winpenny, Richard E. P.
Neese, Frank
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (04) : 760 - 761
[29] Relaxation phenomena in disordered systems
Sciortino, F
Tartaglia, P
PHYSICA A, 1997, 236 (1-2): : 140 - 148
[30] Relaxation phenomena in disordered systems
Sciortino, F.
Tartaglia, P.
Physica A: Statistical Mechanics and its Applications, 1997, 236 (1-2): : 140 - 148

← 1 2 3 4 5 →