A frustrated bimeronium: Static structure and dynamics

We show a topological spin texture called bimeronium in magnets with in-plane magnetization. It is a topological counterpart of skyrmionium in perpendicularly magnetized magnets and can be seen as a combination of two bimerons with opposite topological charges. We report the static structure and spin-orbit-torque-induced dynamics of an isolated bimeronium in a magnetic monolayer with frustrated exchange interactions. We study the anisotropy and magnetic field dependences of a static bimeronium. We also explore the bimeronium dynamics driven by the damping-like spin-orbit torque. We find that the bimeronium shows steady rotation when the spin polarization direction is parallel to the easy axis. Moreover, we demonstrate the annihilation of the bimeronium when the spin polarization direction is perpendicular to the easy axis. Our results are useful for understanding the fundamental properties of bimeronium structures and may offer an approach to build bimeronium-based spintronic devices.

Automated summary

In this study, we present a topological spin texture called bimeronium in magnets with in-plane magnetization, and investigate its static structure and dynamics induced by spin-orbit torque. The results show that bimeronium exhibits steady rotation when the spin polarization direction is parallel to the easy axis, and is annihilated when the spin polarization direction is perpendicular to the easy axis. These findings provide insights into the fundamental properties of bimeronium structures and their potential applications in spintronic devices.