Spin-wave-driven skyrmion manipulation via engineered potential well lines

Abstract

Magnetic skyrmions, as topologically protected spin textures, have emerged as promising candidates for information carriers in next-generation spintronic devices, owing to their nanoscale size, stability, and low driving-current requirements. However, their practical implementation faces significant challenges, including uncontrolled skyrmion motion, random generation, and weak readout signals, which hinder reliable device operation. The recently demonstrated capability to craft potential well lines by modulating local material parameters, such as magnetocrystalline anisotropy and exchange stiffness constant, provides solutions to these challenges. In this work, we proposed an approach to achieve precise skyrmion navigation along predefined trajectories using spin-wave excitation. The proposed method addresses the fundamental limitation in skyrmion propulsion driven by spin waves (SWs), where SW dissipation prevents sustained motion along the wave propagation direction over extended distances. Furthermore, our strategy enhances the readout signal amplitude, addressing a critical issue in skyrmion detection.