Effect of thermal fluctuations in spin-torque driven magnetization dynamics

被引：3
|
作者：
Bonin, R. [1 ]
Bertotti, G.
Serpico, C.
Mayergoyz, I. D.
d'Aquino, M.
机构：
[1] INRiM, I-10135 Turin, Italy
[2] Univ Naples Federico 2, Dipartimento Ingn Elettr, I-80125 Naples, Italy
[3] Univ Maryland, Dept Elect & Comp Engn, College Pk, MD 20742 USA
[4] Univ Napoli Parthenope, Dipartimento Tecnol, I-80133 Naples, Italy
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 316卷 / 02期
关键词：
spin torque; Landau-Lifshitz-Gilbert equation; thermal fluctuation;
D O I：
10.1016/j.jmmm.2007.03.183
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanomagnets with uniaxial symmetry driven by an external field and spin-polarized currents are considered. Anisotropy, applied field, and spin polarization are all aligned along the symmetry axis. Thermal fluctuations are described by adding a Gaussian white noise stochastic term to the Landau-Lifshitz-Gilbert equation for the deterministic dynamics. The corresponding Fokker-Planck equation is derived. It is shown that deterministic dynamics, thermal relaxation, and transition rate between stable states are governed by an effective potential including the effect of current injection. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：E919 / E922
页数：4
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