论文标题
薄膜中的磁弹性波
Magnetoelastic waves in thin films
论文作者
论文摘要
本文讨论了磁弹性和磁弹性波的物理学及其数学描述。磁弹性波是由于磁磁性铁磁介质中的自旋波和弹性波之间的强耦合而发生的。在第一部分中，在散装的铁磁体和薄膜中都回顾了自旋波的基本行为。接下来，讨论弹性波，重点是薄膜。最后，描述了弹性结构域和磁性域之间的相互作用，并显示了这如何导致磁弹性波的形成。基于对大量磁弹性波的描述，开发了薄膜中磁弹性波的理论，并得出了它们的分散关系。结果表明，行为在很大程度上取决于系统的几何形状，尤其是旋转和弹性波的极化以及磁体阻滞性铁磁体的磁化方向。
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.
