论文标题
缺陷与纳米台面中的Skyrmion之间的相互作用
Interaction between defect and skyrmion in nanodisk
论文作者
论文摘要
磁性天空是拓扑保护的稳定磁化构型，预计将是一个有前途的候选者作为信息载体，而缺陷是不可避免的，并且在天空的稳定和运动中起着重要作用。在本文中，我们研究了点缺陷和环形缺陷对纳米台面中天空敏化的稳定和动力学的影响，其中缺陷是通过局部修饰磁性材料参数获得的。考虑到几何限制和固定效果的综合作用，我们证明了首选的天空位置是缺陷类型的函数以及Skyrmion和点缺陷之间的距离。我们还在由于圆形对称性引起的环形缺陷的情况下显示了对天际大小的限制效应。最后，在旋转传输纳米振荡器的应用中，我们表明可以将天空固定或旋转在纳米风险中，振荡器频率可以通过环形缺陷在很大的变化中修改。这些发现提供了对限制几何形状中天空和缺陷之间相互作用的完全理解，并可能为设计天空振荡器的设计提供了良好的策略。
Magnetic skyrmions are topologically protected stable magnetization configurations, which are expected to be a promising candidate as information carrier, while defect is inevitable and plays an important role on the stabilization and movement of skyrmion. In this paper, we investigated the influence of a point defect and a ring defect on the stabilization and dynamics of skyrmion in the nanodisk, where the defect are acquired by local modification magnetic material parameters. Considering the combined action of geometry confinement and pinning effect, we demonstrate the preferred skyrmion position as a function of defect type and distance between skyrmion and a point defect. We also show the confinement effect on skyrmion size in the presence of a ring defect due to circular symmetry. Finally, in the application of spin transfer nano-oscillator, we show that the skyrmion can be pinned or rotate in the nanodisk, the oscillator frequency can be modified in a large variation by the ring defect. These findings provide a complete understanding of interaction between skyrmion and defect in the confined geometry and may provide a good strategy for the design of skyrmion oscillators.
