Manipulation of magnetic domain wall by ferroelectric switching: Dynamic magnetoelectricity at the nanoscale

TL;DR

This paper introduces a dynamic mechanism to control magnetic domain walls in multiferroics using electric fields, leveraging spin dynamics around domain walls for fast, local magnetization tuning.

Contribution

It presents a novel dynamic magnetoelectric coupling mechanism based on spin dynamics, differing from static domain-level approaches.

Findings

Achieved nanoscale domain wall motion via polarization switching

Demonstrated local magnetization control through spin dynamics

Proposed a fast, practical route for magnetoelectric applications

Abstract

Controlling magnetism using voltage is highly desired for applications, but remains challenging due to fundamental contradiction between polarity and magnetism. Here we propose a mechanism to manipulate magnetic domain walls in ferrimagnetic or ferromagnetic multiferroics using electric field. Different from those studies based on static domain-level couplings, here the magnetoelectric coupling relies on the collaborative spin dynamics around domain walls. Accompanying the reversal of spin chirality driven by polarization switching, a "rolling-downhill"-like motion of domain wall is achieved at the nanoscale, which tunes the magnetization locally. Our mechanism opens an alternative route to pursuit practical and fast converse magnetoelectric functions via spin dynamics.