Theory of Domain-Wall Magnetoresistance in Metallic Antiferromagnets

Abstract

We develop a theory to compute the domain-wall magnetoresistance (DWMR) in antiferromagnetic (AFM) metals with different spin structures. In the diffusive transport regime, the DWMR can be either {\it negative} or positive depending on the domain-wall orientation and spin structure. In contrast, when the transport is in the ballistic regime, the DWMR is always positive, and the magnitude depends on the width and orientation of the domain wall. Our results pave the way of using electrical measurements for probing the internal spin structure in antiferromagnetic metals.

8 pages, 6 figures (This version is the same as the published one.)

References in corpus (10)

• Writing and Reading antiferromagnetic Mn${}_2$Au: Néel spin-orbit torques and large anisotropic magnetoresistance
• Microscopic approach to current-driven domain wall dynamics
• Staggered Dynamics in Antiferromagnets by Collective Coordinates
• Current-induced domain wall motion in a nanowire with perpendicular magnetic anisotropy
• Propulsion of a domain wall in an antiferromagnet by magnons
• Antiferromagnetic Domain Wall as Spin Wave Polarizer and Retarder
• Threshold Current of Domain Wall Motion under Extrinsic Pinning, $\beta$-Term and Non-Adiabaticity
• Domain wall heat conductance in ferromagnetic wires
• Driving a magnetized domain wall in an antiferromagnet by magnons
• Numerical Computation of Spin-Transfer Torques for Antiferromagnetic Domain walls

Cited by in corpus (1)

• Uniaxial Néel Vector Control in Perovskite Oxide Thin Films by Anisotropic Strain Engineering