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arXiv 2003.12099cond-mat.mes-hall
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薄膜中的磁弹性波

Magnetoelastic waves in thin films

Frederic Vanderveken, Florin Ciubotaru, Christoph Adelmann

摘要:

本文讨论了磁弹性和磁弹性波的物理性质及其数学描述。磁弹性波是磁致伸缩铁磁介质中自旋波与弹性波强耦合的结果。在第一部分中,自旋波的基本行为进行了审查,无论是散装铁磁体,以及在薄膜。接着,以薄膜为中心讨论弹性波。最后,弹性和磁畴之间的相互作用进行了描述,它是如何在磁弹性波的形成结果。在描述体磁弹性波的基础上,发展了薄膜中磁弹性波的理论,导出了磁弹性波的色散关系。结果表明,该行为强烈依赖于系统的几何形状,特别是对自旋和弹性波的极化和磁化的磁致伸缩铁磁体的方向。

英文摘要:

This paper discusses the physics of magnetoelasticity and magnetoelastic waves as well as their mathematical description. Magnetoelastic waves occur as a result of strong coupling between spin waves and elastic waves in magnetostrictive ferromagnetic media. In a first part, the basic behavior of spin waves is reviewed in both bulk ferromagnets as well as in thin films. Next, elastic waves are discussed with a focus on thin films. Finally, the interactions between the elastic and magnetic domains are described and it is shown how this results in the formation of magnetoelastic waves. Based on the description of bulk magnetoelastic waves, a theory for magnetoelastic waves in thin films is developed and their dispersion relations are derived. It is shown that the behavior strongly depends on the geometry of the system, especially on the polarization of spin and elastic waves and the direction of the magnetization of the magnetostrictive ferromagnet.

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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