Role of surface disorder on the magnetic properties and hysteresis of nanoparticles

被引：89

作者：

Iglesias, O ^{[1
]}

Labarta, A ^{[1
]}

机构：

[1] Univ Barcelona, Dept Fis Fonamental, E-08028 Barcelona, Spain

来源：

PHYSICA B-CONDENSED MATTER | 2004年 / 343卷 / 1-4期

关键词：

Monte Carlo simulation; nanoparticles; hysteresis; ferrimagnets;

D O I：

10.1016/j.physb.2003.08.109

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present the results of Monte Carlo simulations of a model of a single maghemite ferrimagnetic nanoparticle including radial surface anisotropy distinct from that in the core with the aim to clarify its role on the magnetization processes at low temperatures. The low-temperature equilibrium states are analysed and compared to those of a ferromagnetic particle with the same lattice structure. We have found that the formation of hedgehog-like structures due to increased surface anisotropy is responsible for a change in the reversal mechanism of the particles. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：286 / 292

页数：7

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