Path Integral Approach to Stochastic Magnetization Dynamics in Uniaxial Ferromagnetic Nanoparticles

被引：0

作者：

Serpico, C. ^{[1
]}

Bertotti, G. ^{[2
]}

d'Aquino, M. ^{[3
]}

Ragusa, C. ^{[4
]}

Ansalone, P. ^{[4
]}

Mayergoyz, I. D. ^{[5
]}

机构：

[1] Univ Naples Federico II, Dip Ingn Elettr, I-80125 Naples, Italy

[2] INRiM, I-10135 Turin, Italy

[3] Univ Napoli Parthenope, I-80133 Naples, Italy

[4] Politecn Torino, I-10129 Turin, Italy

[5] Univ Maryland, Dept Elect & Comp Engn, College Pk, MD 20742 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2008年 / 44卷 / 11期

关键词：

Landau-Lifshitz equation; thermal fluctuations; path integral;

D O I：

暂无

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：

We study stochastic magnetization dynamics in uniformly magnetized uniaxial particles. The solution of the Fokker-Planck equation associated with the problem is expressed as a Wiener-type Path Integral. This path integral is then approximately computed in the limit of small noise by using action minimization technique. This analytical technique is used to compute typical durations of thermal induced transitions between opposite magnetization orientations. The analytical results are compared with numerical integration of the Landau-Lifshitz equation describing the stochastic magnetization dynamics.

引用

页码：3157 / 3160

页数：4

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Dip. di Ingegneria Elettrica, Università di Napoli Federico II, Napoli 80125, Italy
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IEEE Trans Magn, 2008, 11 PART 2 (3157-3160):
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