论文标题
从动态结构域壁上的自旋波发射的集体坐标研究
Collective coordinate study of spin wave emission from dynamic domain wall
论文作者
论文摘要
从理论上讲，我们从铁磁体中的移动域壁上研究了自旋波发射。引入变形模式，描述了集体坐标描述中壁厚的调制，我们表明厚度变化伴侣与旋转波线性线性线性并诱导自旋波发射。主要的发出的自旋波在壁外平面（$ ϕ $） - 方向上是两极分化的。发射有助于吉尔伯特阻尼参数与$ \hbarΩ_x/k $成比例，角度频率$ω__$ $ ϕ $的比率和易于轴各向异性元素能量$ k $。
We study theoretically the spin wave emission from a moving domain wall in a ferromagnet. Introducing a deformation mode describing a modulation of the wall thickness in the collective coordinate description, we show that thickness variation couples to the spin wave linearly and induces spin wave emission. The dominant emitted spin wave turns out to be polarized in the out-of wall plane ($ϕ$)-direction. The emission contributes to the Gilbert damping parameter proportional to $\hbarω_ϕ/K$, the ratio of the angular frequency $ω_ϕ$ of $ϕ$ and the easy-axis anisotropy energy $K$.
