Institut für Experimentelle Physik, Universität Regensburg, D-93040 Regensburg, Germany.
Physik-Department, Technische Universität München, D-85748 Garching, Germany.
Phys Rev Lett. 2019 Oct 18;123(16):167201. doi: 10.1103/PhysRevLett.123.167201.
Cubic chiral magnets, such as Cu_{2}OSeO_{3}, exhibit a variety of noncollinear spin textures, including a trigonal lattice of spin whirls, the so-called skyrmions. Using magnetic resonant elastic x-ray scattering (REXS) on a crystalline Bragg peak and its magnetic satellites while exciting the sample with magnetic fields at gigahertz frequencies, we probe the ferromagnetic resonance (FMR) modes of these spin textures by means of the scattered intensity. Most notably, the three eigenmodes of the skyrmion lattice are detected with large sensitivity. As this novel technique, which we label REXS FMR, is carried out at distinct positions in reciprocal space, it allows us to distinguish contributions originating from different magnetic states, providing information on the precise character, weight, and mode mixing as a prerequisite of tailored excitations for applications.
立方手性磁体，如 Cu_{2}OSeO_{3}，表现出多种非共线自旋织构，包括三角晶格的自旋涡旋，即所谓的斯格明子。我们使用千兆赫兹频率磁场激励样品的磁性共振弹性 X 射线散射 (REXS) 在晶体布拉格峰及其磁卫星上进行探测，通过散射强度来探测这些自旋织构的铁磁共振 (FMR) 模式。值得注意的是，我们标记为 REXS FMR 的这项新技术在倒易空间的不同位置进行，它允许我们区分源自不同磁态的贡献，为针对应用的定制激发提供关于精确特征、权重和模式混合的信息。
