Increased Gilbert damping in spin valves and magnetic tunnel junctions

被引：23
|
作者：
Lagae, L
Wirix-Speetjens, R
Eyckmans, W
Borghs, S
De Boeck, J
机构：
[1] IMEC, Louvain, Belgium
[2] Katholieke Univ Leuven, ESAT INSYS, Louvain, Belgium
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 286卷
关键词：
magnetization dynamics; Gilbert damping; spin-valve; magnetic tunnel junction;
D O I：
10.1016/j.jmmm.2004.09.083
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present a study on the Gilbert damping constant alpha in magnetic multilayers using the time-resolved MOKE technique. All observed alpha-values in Ni80Fe20 thin films with Cu/Ta seed and capping layers can be modeled using a spin pumping model. Investigation in device layers (spin-valves and magnetic tunnel junctions) is consistent with this model. An additional effect of the magnetization state of the pinned layer on free layer damping in spin valves is seen. These insights in the effect of interfaces on magnetic relaxation provide methods for optimization of magnetic devices for numerous high-speed applications. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：291 / 296
页数：6
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