Magnetic phase diagram of interacting nanoparticle systems under the mean-field model

被引：5
|
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：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2011年 / 23卷 / 22期
基金：
中国国家自然科学基金;
关键词：
PARTICLE SYSTEM; DIPOLAR INTERACTIONS; DYNAMICS; BEHAVIOR; FILMS;
D O I：
10.1088/0953-8984/23/22/226005
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The disordered random-anisotropy magnetic nanoparticle systems with competing dipolar interactions and ferromagnetic exchange couplings are investigated by Monte Carlo simulations. Superspin glass (SSG) and superferromagnetic (SFM) behaviors are found at low temperatures depending on the interactions. Based on the mean-field approximation, the Curie-Weiss temperature T-CW = 0 is suggested as the phase boundary between the SSG systems and the SFM systems, which is evidenced by the spontaneous magnetizations and relaxations. The magnetic phase diagram is plotted.
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页数：5
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