Dynamics of a magnetic skyrmionium driven by spin waves

TL;DR

This study investigates the dynamics of magnetic skyrmioniums driven by spin waves, revealing their high mobility, controllability via external fields, and inertial motion, highlighting their potential for spintronic device applications.

Contribution

It demonstrates the effective driving of skyrmioniums by spin waves and explores how their mobility depends on material parameters and external magnetic fields.

Findings

Skyrmioniums exhibit high mobility with minimal skyrmion Hall effect.

Mobility depends on nanotrack width and damping coefficient.

Skyrmionium motion driven by spin waves is inertial.

Abstract

The magnetic skyrmionium is a skyrmion-like structure but carries a zero net skyrmion number, which can be used as a building block for non-volatile information processing devices. Here, we study the dynamics of a magnetic skyrmionium driven by propagating spin waves. It is found that the skyrmionium can be effectively driven into motion by spin waves showing tiny skyrmion Hall effect, of which the mobility is much better than that of the skyrmion at the same condition. We also show that the skyrmionium mobility depends on the nanotrack width and damping coefficient, and can be controlled by an external out-of-plane magnetic field. Besides, we demonstrate the skyrmionium motion driven by spin waves is inertial. Our results indicate that the skyrmionium is a promising building block for building spin-wave spintronic devices.