Complex magnetic susceptibility of uniaxial superparamagnetic particles in a strong static magnetic field

被引：41

作者：

Kalmykov, YP ^{[1
]}

Titov, SV ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Radioengn & Elect, Fryazino 141120, Russia

来源：

PHYSICS OF THE SOLID STATE | 1998年 / 40卷 / 09期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/1.1130584

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The magnetic relaxation of a system of single-domain ferromagnetic particles in the presence of a strong static magnetic field directed at an arbitrary angle relative to the particle anisotropy axis is investigated. A system of linear difference-differential equations for the moments (averaged spherical harmonics! is derived without recourse to the Fokker-Planck equation by averaging Gilbert's equations with a fluctuating field. An exact solution (in terms of matrix continuous fractions) is found for this system. The relaxation times and spectra of the complex magnetic susceptibility are calculated. (C) 1998 American Institute of Physics. [S1063-7834(98)01709-2].

引用

页码：1492 / 1499

页数：8

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