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

被引：0
|
作者：
Yu. P. Kalmykov
S. V. Titov
机构：
[1] Russian Academy of Sciences,Institute of Radio Engineering and Electronics
来源：
Physics of the Solid State | 1998年 / 40卷
关键词：
Spectroscopy; Anisotropy; Relaxation Time; Exact Solution; Magnetic Susceptibility;
D O I：
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学科分类号：
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.
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页码：1492 / 1499
页数：7
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