Analytical study of magnetization dynamics driven by spin-polarized currents

被引：20
|
作者：
Bonin, R. [1 ]
Serpico, C. [2 ]
Bertotti, G. [1 ]
Mayergoyz, I. D. [3 ]
d'Aquino, M. [4 ]
机构：
[1] Ist Nazl Ric Metrol, I-10135 Turin, Italy
[2] Univ Naples Federico II, 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：
EUROPEAN PHYSICAL JOURNAL B | 2007年 / 59卷 / 04期
关键词：
D O I：
10.1140/epjb/e2007-00051-5
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
An analytical approach is presented for the study of magnetization dynamics driven by spin-polarized currents. Two cases are considered: (i) magnetic layers with in-plane uniaxial anisotropy; (ii) magnetic layers with uniaxial anisotropy and applied field perpendicular to the layer plane. Theoretical predictions are obtained for the existence of stationary modes and self-oscillations of magnetization by solving the deterministic Landau-Lifshitz-Gilbert equation with Slonczewski spin-torque term. Thermal fluctuations are studied by deriving the corresponding Fokker-Planck equation for the magnetization probability distribution. Analytical procedures to estimate the effective potential barrier separating selfoscillatory regimes and/or stationary modes are proposed.
引用
收藏
页码：435 / 445
页数：11
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