Magnetic damping modulation in $IrM{n}_3/N{i}_{80}F{e}_{20}$ via the magnetic spin Hall effect

Abstract

Non-collinear antiferromagnets can have additional spin Hall effects due to the net chirality of their magnetic spin structure, which provides for more complex spin-transport phenomena compared to ordinary non-magnetic materials. Here we investigated how ferromagnetic resonance of permalloy ($N{i}_{80}F{e}_{20}$) is modulated by spin Hall effects in adjacent epitaxial $IrM{n}_3$ films. We observe a large dc modulation of the ferromagnetic resonance linewidth for currents applied along the [001] $IrM{n}_3$ direction. This very strong angular dependence of spin-orbit torques from dc currents through the bilayers can be explained by the magnetic spin Hall effect where $IrM{n}_3$ provides novel pathways for modulating magnetization dynamics electrically.