Electric voltage generation by antiferromagnetic dynamics

TL;DR

This paper presents a theoretical framework for generating dc and ac electric voltages from antiferromagnetic domain wall motion and resonance, advancing the electrical detection of antiferromagnetic dynamics.

Contribution

It introduces a comprehensive theory incorporating canting, nonadiabatic effects, and Rashba spin-orbit coupling for voltage generation in two-sublattice antiferromagnets.

Findings

Voltage signals depend on domain wall motion and magnetic resonance.

The theory predicts measurable voltages for antiferromagnetic textures.

Provides a new electrical method to observe antiferromagnetic dynamics.

Abstract

We theoretically demonstrate dc and ac electric voltage generation due to spinmotive forces originating from domain wall motion and magnetic resonance, respectively, in two-sublattice antiferromagnets. Our theory accounts for the canting between the sublattice magnetizations, the nonadiabatic electron spin dynamics, and the Rashba spin-orbit coupling, with the inter-sublattice electron dynamics treated as a perturbation. This work suggests a new way to observe and explore the dynamics of antiferromagnetic textures by electrical means, an important aspect in the emerging field of antiferromagnetic spintronics, where both manipulation and detection of antiferromagnets are needed.