Dynamic properties of the magnetic skyrmion driven by electromagnetic waves with SAM and OAM

Abstract In this paper, we theoretically studied the dynamic properties of the skyrmion driven by electromagnetic (EM) waves with spin angular momentum (SAM) and orbital angular momentum (OAM) using micromagnetic simulations. Firstly, the guiding centers of the skyrmion driven by EM waves with SAM, i.e. left-handed and right-handed circularly polarized EM waves present circular trajectories, while present elliptical under linear EM waves driving due to the superposition of oppositely polarized wave components. Secondly, the trajectories of the skyrmion driven by EM waves with OAM demonstrate similar behaviors to those driven by linearly polarized EM waves. Due to that the waves vector intensity varies with the phase for both of linearly polarized EM waves and EM waves with OAM, the angular momentum is transferred to the skyrmion non-uniformly, while the angular momentum is transferred to the skyrmion uniformly for left-handed and right-handed circularly polarized EM driving. Thirdly, the dynamic properties of skyrmion driven by EM waves with both of SAM and OAM are investigated. It is found that, the dynamic trajactories exhibit more complex behaviors due to the contributions or compititions from both of SAM and OAM. At meantime, we investigate the characterisitcs of intrinsic gyration modes and frequency dependent trajectories. Our research may present the understanding of the dynamic properties of skyrmion manipulated by EM waves with SAM or OAM and provide a method for controlling skyrmion in spintronic devices.