Temperature dependence of the coefficient of reflection of microwave radiation from a magnetic fluid layer

被引：0
|
作者：
D. A. Usanov
Al. V. Skripal
An. V. Skripal
A. É. Postel’ga
Yu. L. Raikher
V. I. Stepanov
机构：
[1] Chernyshevsky State University,Institute of Continuum Mechanics, Ural Division
[2] Russian Academy of Sciences,undefined
来源：
Technical Physics | 2006年 / 51卷
关键词：
75.50.Mm;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The coefficient of reflection of microwave radiation from a plane layer of a magnetic fluid magnetized in a field of 11.5 Oe is measured in a frequency range of 24 MHz in temperature intervals 293–333 K; the volume concentration of the magnetic phase (magnetite) is 15 vol %. In this range, the dynamic susceptibility of nanoparticles exhibits strong dispersion (ferromagnetic resonance). The experimental results are interpreted on the basis of the theory of high-frequency magnetization for an ensemble of noninteracting isotropic super-paramagnetic particles. It is found that this simple model provides a satisfactory description of the temperature and frequency dependences of the reflection coefficient.
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页码：1520 / 1523
页数：3
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