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arXiv 1607.07424cond-mat.mes-hall
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自旋波光束通过各向异性铁磁体界面时的古斯-汉臣位移

Goos-Hanchen shift of a spin-wave beam transmitted through anisotropic interface between two ferromagnets

P. Gruszecki, M. Mailyan, O. Gorobets, M. Krawczyk

摘要:

自旋波是一种很有前途的信息载体,是目前磁物理研究的主要对象。目前最常研究的是平面波类SW和SW在受限结构(如波导)中传播。本文考虑高斯SW光束斜入射到两个相同铁磁材料之间的超窄界面上。我们使用的分析模型和微磁模拟的界面特性,特别是磁各向异性,对SW光束的传输的影响进行了深入的分析。我们推导出的反射率,透射率,相移和古斯-汉臣(GH)位移的光束反射和折射的两个半无限铁磁介质之间的界面的解析公式,折射光束的结果是第一次被报道的日期。在SW光束的反射和透射的GH移位的薄膜几何形状的微磁模拟证实。我们证明了在界面处的磁各向异性,入射角和SW的频率的特征属性的依赖关系。我们还提出了一种高质量的SW光束的微磁模拟的激励方法。

英文摘要:

The main object of investigation in magnonics, spin waves (SWs) are promising information carriers. Presently the most commonly studied are plane wave-like SWs and SWs propagating in confined structures, such as waveguides. Here we consider a Gaussian SW beam obliquely incident on an ultra-narrow interface between two identical ferromagnetic materials. We use an analytical model and micromagnetic simulations for an in-depth analysis of the influence of the interface properties, in particular the magnetic anisotropy, on the transmission of the SW beam. We derive analytical formulas for the reflectance, transmittance, phase shift and Goos-Hanchen (GH) shift for beams reflected and refracted by an interface between two semi-infinite ferromagnetic media; the results for the refracted beam are the first to be reported to date. The GH shifts in SW beam reflection and transmission are confirmed by micromagnetic simulations in the thin-film geometry. We demonstrate the dependence of the characteristic properties on the magnetic anisotropy at the interface, the angle of incidence and the frequency of the SWs. We also propose a method for the excitation of high-quality SW beams in micromagnetic simulations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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