Optimum condition for spin-current generation from magnetization precession in thin film systems

被引：83

作者：

Ando, K. ^{[1
]}

Yoshino, T. ^{[1
]}

Saitoh, E. ^{[1
,2
]}

机构：

[1] Keio Univ, Dept Appl Phys & Physicoinformat, Yokohama, Kanagawa 2238522, Japan

[2] Japan Sci & Technol Agcy, PRESTO, Tokyo 1020075, Japan

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 15期

关键词：

ferromagnetic materials; iron alloys; magnetic thin films; magnetisation; magnetoelectronics; nickel alloys; platinum; spin dynamics; spin Hall effect;

D O I：

10.1063/1.3119314

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The generation efficiency of spin currents induced by a magnetization-precession motion in a thin film system has been investigated in terms of a magnetization-precession trajectory. By using the Landau-Lifshitz-Gilbert equation combined with the phenomenological model of the spin pumping, the generation efficiency is calculated to be equal to the elliptical orbit area of magnetization precession, which is maximized when the precession trajectory is distorted. This calculation well reproduces experimental results on the magnetization-angle dependence of the inverse spin-Hall signal induced by the spin pumping in a Ni(81)Fe(19)/Pt bilayer film.

引用

页数：3

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