Direct and inverse spin-orbit torques in antiferromagnetic and ferromagnetic FeRh/W(001)

Abstract

We use \textit{ab-initio} calculations to investigate spin-orbit torques (SOTs) in FeRh(001) deposited on W(100). Since FeRh undergoes a ferromagnetic-antiferromagnetic phase transition close to room temperature, we consider both phases of FeRh. In the antiferromagnetic case we find that the effective magnetic field of the even torque is staggered and therefore ideal to induce magnetization dynamics or to switch the antiferromagnet (AFM). At the antiferromagnetic resonance the inverse SOT induces a current density, which can be determined from the SOT. In the ferromagnetic case our calculations predict both even and odd components of the SOT, which can also be used to describe the ac and dc currents induced at the ferromagnetic resonance. For comparison we compute the SOTs in the c($2\times 2$) AFM state of Fe/W(001).

References in corpus (5)

• Spin pumping and spin-transfer torques in antiferromagnets
• Spectral and Fermi surface properties from Wannier interpolation
• Maximally Localized Wannier Functions within the FLAPW formalism
• Imaging of current induced Néel vector switching in antiferromagnetic Mn${}_2$Au
• Electronic structure and magnetic properties of epitaxial FeRh(001) ultra-thin films on W(100)