Driving magnetic skyrmions with microwave fields
Driving magnetic skyrmions with microwave fields
复制标题
DOI：
10.1103/physrevb.92.020403
复制
发表时间：
2015-05
影响因子：
3.7
通讯作者：
Weiwei Wang;M. Beg;Bin Zhang;W. Kuch;H. Fangohr
中科院分区：
文献类型：
--
作者：
Weiwei Wang;M. Beg;Bin Zhang;W. Kuch;H. Fangohr
通过数值求解二维系统中经典自旋模型下的Landau-Lifshitz-吉尔伯特方程，我们从理论上证明了磁skyrmion和skyrmion晶格都可以随微波磁场而移动.该机制通过打破skyrmion的轴对称性来实现，例如，通过施加静态面内外场。Skyrmion的净速度取决于微波场的频率和振幅以及面内场的强度。当微波频率与Skyrmions呼吸模式的共振频率一致时，发现最大速度
We show theoretically by numerically solving the Landau-Lifshitz-Gilbert equation with a classical spin model on a two-dimensional system that both magnetic skyrmions and skyrmion lattices can be moved with microwave magnetic fields. The mechanism is enabled by breaking the axial symmetry of the skyrmion, for example, through application of a static in-plane external field. The net velocity of the skyrmion depends on the frequency and amplitude of the microwave fields as well as the strength of the in-plane field. The maximum velocity is found where the frequency of the microwave coincides with the resonance frequency of the breathing mode of the skyrmions