Curvature-dependent spin-wave resonance of magnetic bimerons in cylindrical nanotubes

Abstract

Magnetic bimerons, in-plane analogs of skyrmions, exhibit unique spin-wave dynamics arising from their broken rotational symmetry. Here, we investigate the curvature-dependent spin-wave resonance of bimerons stabilized in cylindrical magnetic nanotubes by means of micromagnetic simulations. Using frequency-domain analysis, we characterize the equilibrium textures, dynamic susceptibility, and spatial profiles of the eigenmodes. We show that the bimeron breathing-like resonance mode shifts systematically to lower frequencies as the nanotube radius increases, ranging from ∼8 GHz in highly curved tubes to ∼3.7 GHz in the flat limit. The resonance is accompanied by distinct spatial oscillations of the magnetization. These findings demonstrate that curvature serves as an effective geometrical design parameter for engineering the dynamical properties of bimerons and open avenues for exploiting their spin-wave resonances in advanced magnonic and spintronic architectures.