Fig. 1: Concept of skyrmion motion driven by SAWs and the device schematics.
a Schematic diagram of skyrmion dynamics driven by a Rayleigh wave or a shear horizontal (SH) wave. b Simulated skyrmion pinning under an elastic wave with periodic shear vertical displacements. Due to the limitation of the computational capacity, the diameter of the simulated skyrmion is set as 30 nm. The wavelength is 240 nm which is eight times as large as the simulated skyrmion size. The color scale represents the normalized (out-of-plane) magnetization component mz. c the magnetoelastic energy density, d The total energy density of the skyrmion under an elastic wave with periodic shear vertical displacements. e Simulated skyrmion motion driven by an SH wave. The arrow denotes the trajectory of motion. f The magnetoelastic energy density, g the total energy density of the skyrmion under an SH wave. h Schematic of the SAW delay line device configuration. i Transmission spectrums (S12) of the SH wave and the Rayleigh wave. The wavelength of SAWs is 8 μm.
