We study the dynamical control of a magnetic skyrmion bubble by using counter-propagating surface acoustic waves (SAWs) in a ferromagnet. First, we determine the bubble mass and derive the force due to SAWs acting on a magnetic bubble using Thiele's method. The force that pushes the bubble is proportional to the strain gradient for the major strain component. We then study the dynamical pinning and motion of magnetic bubbles by SAWs in a nanowire. In a disk geometry, we propose a SAWs-driven skyrmion bubble oscillator with two resonant frequencies.

中文翻译：

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表面声波驱动的磁性斯格明子气泡运动

我们通过在铁磁体中使用反向传播的表面声波 (SAW) 来研究磁性斯格明气泡的动力学控制。首先，我们使用 Thiele 方法确定气泡质量并推导出 SAW 作用在磁气泡上的力。推动气泡的力与主要应变分量的应变梯度成正比。然后，我们研究了纳米线中 SAW 磁泡的动态钉扎和运动。在圆盘几何结构中，我们提出了一种具有两个谐振频率的 SAW 驱动的斯格明子气泡振荡器。