Non-linear dynamic response of superparamagnetic nanoparticles

被引：7
|
作者：
Raikher, YL [1 ]
Stepanov, VI [1 ]
机构：
[1] RAS, Ural Div, Inst Continuous Media Mech, Perm 614013, Russia
来源：
MICROELECTRONIC ENGINEERING | 2003年 / 69卷 / 2-4期
关键词：
superparamagnetic particles; magnetic susceptibilities; higher harmonics generation;
D O I：
10.1016/S0167-9317(03)00315-0
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Odd-order dynamic magnetic susceptibilities of an assembly of single-domain uniaxial particles in the low-temperature limit are considered. The solution of the micromagnetic Fokker-Planck equation is presented in the form of asymptotic series with respect to the parameter sigma that is the ratio of the anisotropy energy barrier height to the thermal energy. The expressions for the set of susceptibilities up to the fifth order are presented for the case of an assembly of particles randomly oriented in a solid matrix. The validity of the derived asymptotic representation in a wide range of sigma is proved by comparison with the numerical solution of the Fokker-Planck equation. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：317 / 323
页数：7
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