Ultrafast chirality reversal of magnetic vortices via perpendicular field pulses

Abstract

We investigate the ultrafast switching dynamics of magnetic vortex chirality driven by picosecond Gaussian out-of-plane magnetic field pulses, using micromagnetic simulations based on the inertial Landau–Lifshitz–Gilbert equation. Our study demonstrates that specific amplitudes and durations of perpendicular magnetic field pulses can effectively induce ultrafast and controllable chirality switching of the vortex. In contrast to previously reported mechanisms based on asymmetry control or chirality switching induced by in-plane field pulses, we show that under strong perpendicular pulses, all magnetic moments can undergo coherent precessional rotation, leading to a direct reversal of chirality. This work presents a novel approach for controlling chirality in magnetic vortex-based information storage and logic devices.