Ni薄膜中600 MHz SAW速度变化的磁场依赖性

IEEE 1988 Ultrasonics Symposium Proceedings. Pub Date : 1988-10-02 DOI:10.1109/ULTSYM.1988.49389

D. Walikainen, R. Wiegert, M. Levy

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引用次数: 2

摘要

作者推导出了磁致伸缩薄膜表面声波速随面内磁场变化的表达式，与Ni薄膜的结果吻合较好。所提出的动力学模型是基于描述薄膜的平面内磁化受到各向异性场周期性磁致伸缩变化的扰动。耗散是用吉尔伯特方程从现象学上解释的。结果表明，衰减和速度变化具有相同的定性场依赖性。

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Magnetic field dependence of 600 MHz SAW velocity changes for thin Ni films

The authors derive an expression for the change in SAW (surface acoustic wave) velocity as a function of in-plane magnetic field for thin magnetostrictive films, which compares well with the data for thin Ni films. The proposed dynamic model is based on describing the films' in-plane magnetization as being perturbed by the periodic magnetostrictive induced change in the anisotropy field. The dissipation is phenomenologically accounted for by the Gilbert equation. It is shown that the attenuation and velocity changes have the same qualitative field dependence.<>

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IEEE 1988 Ultrasonics Symposium Proceedings.

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