# Cross effect of magnetic field and charge current on antiferromagnetic dynamics

## TL;DR

This paper theoretically investigates how combining magnetic fields with charge currents can control antiferromagnetic domain wall dynamics, revealing a new method for field-assisted manipulation of antiferromagnets.

## Contribution

It introduces the novel concept that magnetic fields, when combined with charge currents, can influence antiferromagnetic domain wall motion, which was previously thought to be insensitive to magnetic fields.

## Key findings

- Magnetic field and charge current jointly affect domain wall motion.
- Spatially-varying magnetic fields can shift domain-wall velocity.
- The effect depends on domain-wall structure and field-gradient direction.

## Abstract

We theoretically examine a cross effect of magnetic field and charge current on antiferromagnetic domain wall dynamics. Since antiferromagnetic materials are largely insensitive to external magnetic fields in general, charge current has been shown recently as an alternative and efficient way to manipulate antiferromagnets. We find a new role of the magnetic field in the antiferromagnetic dynamics that appears when it is combined with charge current, demonstrating a domain wall motion in the presence of both field and current. We show that a spatially-varying magnetic field can shift the current-driven domain-wall velocity, depending on the domain-wall structure and the direction of the field-gradient. Our result suggests a novel concept of field-control of current-driven antiferromagnetic dynamics.