Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films

TL;DR

This paper investigates Dzyaloshinskii domain walls in ultrathin magnetic films, revealing their high stability and potential for efficient current-driven motion, which could impact spintronic device design.

Contribution

It introduces and analyzes a new type of domain wall influenced by Dzyaloshinskii-Moriya interaction, combining numerical and analytical micromagnetic methods.

Findings

Dzyaloshinskii domain walls behave like stable Neel walls.

They can move at high velocities under large magnetic fields.

Potential applications in spin Hall effect-driven domain wall motion.

Abstract

We explore a new type of domain wall structure in ultrathin films with perpendicular anisotropy, that is influenced by the Dzyaloshinskii-Moriya interaction due to the adjacent layers. This study is performed by numerical and analytical micromagnetics. We show that these walls can behave like Neel walls with very high stability, moving in stationary conditions at large velocities under large fields. We discuss the relevance of such walls, that we propose to call Dzyaloshinskii domain walls, for current-driven domain wall motion under the spin Hall effect.