Year: 2018
Type: article
Abstract: We report on a first-principles study of antiferromagnetic resonance (AFMR) phenomena in metallic systems $[\mathrm{Mn}X$ ($X=\text{Ir}$, Pt, Pd, Rh) and FeRh] under an external electric field. We demonstrate that the AFMR linewidth can be separated into a relativistic component originating from the angular momentum transfer between the collinear AFM subsystem and the crystal through spin-orbit coupling, and an exchange component that originates from the spin exchange between the two sublattices. The calculations reveal that the latter component becomes significant in the low-temperature regime. Furthermore, we present results for the current-induced intersublattice torque which can be separated into fieldlike and dampinglike components, affecting the intersublattice exchange coupling and AFMR linewidth, respectively.
Authors: Farzad Mahfouzi, Nicholas Kioussis
Institution: California State University, Northridge
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: National Science Foundation
OpenAlex ID: W2903796408