Manipulation of single skyrmions and skyrmion clusters with electron currents, heat, microwaves, and magnons

这个项目的目的是研究在外部刺激下由高质量大块晶体定义的纳米结构中的Skyrmions的动力学。我们的策略是利用聚焦离子束技术来制备多铁性绝缘体Cu2OSeO3的纳米结构。我们决定从高质量的块状材料开始，因为已经证明在这种晶体中很容易诱导天米子运动。然而，我们也打算研究由DFG优先计划中的其他小组提供的高质量的天米子托管薄膜材料。我们将研究自旋波与纳米结构和薄膜中天米子晶体、天米子贴片和单个天米子的手性自旋织构的相互作用。在这里，我们将使用时间分辨磁光克尔显微镜、微聚焦布里渊光散射和全电探测来研究自旋波在Skyrmion织构中的传播和散射。我们的目标是间接探测Skyrmions，并将研究与之相关的磁振子霍尔效应。同时，我们将在双层铁磁体和手性磁体上进行局部铁磁共振测量，以确定样品的相图。

The aim of this project is to investigate the dynamics of skyrmions in nanostructures defined from high quality bulk crystals under external stimulus. Our strategy is to prepare nanostructures of the multiferroic insulator Cu2OSeO3 using focused ion beam techniques. We have decided to start from high quality bulk materials since it has been shown that skyrmion motion is easily induced in such crystals. However, we also intend to investigate high quality skyrmion hosting thin film materials provided by other groups within the DFG priority program.We will study the interaction of spin waves with chiral spin textures of skyrmion crystals, skyrmion patches, and individual skyrmions in nanostructures and thin films. Here, we will use time resolved magneto-optic Kerr microscopy, micro-focused Brillouin light scattering, and all-electrical detection to investigate spin wave propagation and the scattering of spin waves in skyrmion textures. We aim at the indirect detection of skyrmions and will investigate the associated magnon Hall effect. In parallel, we will perform local ferromagnetic resonance measurements on bilayers of ferromagnets and chiral magnets to determine phase diagrams of the samples.