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Nonlinear transverse standing spin wave modes of a magnetic film
Journal of Physics: Condensed Matter ( IF 2.7 ) Pub Date : 2020-05-28 , DOI: 10.1088/1361-648x/ab8b9f
Herv Leblond 1 , Valentin Besse 2
Affiliation  

We derive an asymptotic model for wave propagation across a ferromagnetic film, neglecting anisotropy and damping, close to the ferromagnetic resonance. The resulting model is a nonlinear Schrödinger equation, which can be either focusing or defocussing, depending on the magnitude and direction of the external magnetic field. We use it to compute the nonlinear eigenmodes of standing spin waves, that can be excited in the film; the eigenmodes can be expressed using Jacobi's elliptic functions. It is shown that their frequency spectrum varies with the amplitude of the modes.

中文翻译:

磁性薄膜的非线性横向自旋驻波模式

我们推导出了波在铁磁膜上传播的渐近模型,忽略了各向异性和阻尼,接近铁磁共振。由此产生的模型是一个非线性薛定谔方程,它可以是聚焦或散焦的,这取决于外部磁场的大小和方向。我们用它来计算驻旋波的非线性本征模,可以在薄膜中激发;特征模态可以用雅可比椭圆函数表示。结果表明,它们的频谱随模式的幅度而变化。
更新日期:2020-05-28
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