Reciprocal Ferromagnetic Resonant Behaviors Driven by Shear Strains in Isolated Skyrmions

Abstract

Strain‐mediated magnetoelastic coupling provides a powerful way to manipulate the dynamics of magnetic textures because of its energy efficiency, which is promising for applications in spintronics. Herein, it is demonstrated that reciprocal ferromagnetic resonant behaviors can be induced in isolated skyrmions by applying inverse shear strains, physically originating from the symmetric deformations of skyrmions, which cannot exist in the ones induced by normal strains. A linear relationship between resonant frequencies (f) and shear strains (εxy) is given by f = ±24.4 × εxy + 0.03, where the symbols of + and − denote positive and negative shear strains, respectively. The resonant frequency increases from 0.1 to 0.98 GHz with the change of shear strains from −0.003 to −0.039 or from 0.003 to 0.039. The breathing mode is observed by profiles of temporal evolutions for dynamics of deformed skyrmions, ascribed to the applied microwave magnetic field along the out‐of‐plane direction. The proposed results can provide insight into controlling resonant frequencies by strain engineering.