Collective coordinate study of spin-wave emission from a dynamic domain wall
Collective coordinate study of spin-wave emission from a dynamic domain wall
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DOI：
10.1103/physrevb.101.224425
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发表时间：
2020-04
影响因子：
3.7
通讯作者：
G. Tatara;Rub'en M. Otxoa de Zuazola
中科院分区：
文献类型：
--
作者：
G. Tatara;Rub'en M. Otxoa de Zuazola
动态孤子的辐射是一个基本的兴趣问题。在这里，作者研究的发射从一个域壁在铁磁体考虑到集体坐标的调制的壁厚（呼吸模式），除了传统的坐标，描述的滑动运动和倾斜角的壁平面。呼吸模式被示出具有线性耦合的波动（自旋波），因此，它是自旋波发射的主要来源。确定了发射自旋波的波形，并估计了发射对吉尔伯特阻尼参数的贡献。
Radiation from a dynamic soliton is an issue of fundamental interest. Here, the authors study the emission from a domain wall in a ferromagnet taking into account the collective coordinate for the modulation of the wall thickness (breathing mode) in addition to the conventional coordinates, describing the sliding motion and the tilting angle of the wall plane. The breathing mode is shown to have a linear coupling to the fluctuation (spin wave), hence, it is the dominant source of spin-wave emission. The wave profile of the emitted spin wave is identified and the contribution to the Gilbert damping parameter due to the emission is estimated.