Microwave-driven dynamics and device functions of magnetic skyrmions
Magnetic skyrmions, particle-like topological spin textures that emerge in magnets with broken inversion symmetry, are currently attracting great interest in spintronics research. Intensive studies have uncovered that magnetic skyrmions possess rich device functions, which are expected to be applied to memory, logic and microwave devices. In this article, we discuss fascinating dynamical phenomena and device functions of magnetic skyrmions originating from their peculiar microwave-active spin-wave modes. Excitations of the spin-wave modes of skyrmions in a two-dimensional system under application of a static magnetic field tilted from the vertical direction give rise to the microwave-driven translational motion of skyrmions and the skyrmion-based microwave-DC-voltage conversion. These findings indicate possible rich physics and functionalities in skyrmion dynamics under a tilted magnetic field.
- 1 Department of Applied Physics, School of Advanced Science and Engineering, Waseda University