Superparamagnetic nanoparticle ensembles

被引：125

作者：

Petracic, O. ^{[1
]}

机构：

[1] Ruhr Univ Bochum, Inst Expt Phys Condensed Matter Phys, D-44780 Bochum, Germany

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2010年 / 47卷 / 05期

关键词：

Magnetic nanoparticles; Superparamagnetic nanoparticles; Superparamagnetism; MAGNETIC NANOPARTICLES; THERMAL FLUCTUATIONS; PARTICLE; RELAXATION; BEHAVIOR; SYSTEM;

D O I：

10.1016/j.spmi.2010.01.009

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Magnetic single-domain nanoparticles constitute an important model system in magnetism. In particular, ensembles of superparamagnetic nanoparticles can exhibit a rich variety of different behaviors depending on the inter-particle interactions. Starting from isolated single-domain ferromagnetic or ferrimagnetic nanoparticles, the magnetization behavior of both non-interacting and interacting particle ensembles is reviewed. Particular attention is given to the relaxation time of the system. In the case of interacting nanoparticles the usual Neel-Brown relaxation law becomes modified. With increasing interactions, modified superparamagnetism, spin glass behavior and superferromagnetism are encountered. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：569 / 578

页数：10

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