Unified treatment of spin torques using a coupled magnetisation dynamics and three-dimensional spin current solver.

ABSTRACT: A three-dimensional spin current solver based on a generalised spin drift-diffusion description, including the bulk and interfacial spin Hall effects, is integrated with a magnetisation dynamics solver. The resulting model is shown to simultaneously reproduce the spin-orbit torques generated using the spin Hall effect, spin pumping torques generated by magnetisation dynamics in multilayers, as well as the spin transfer torques acting on magnetisation regions with spatial gradients, whilst field-like and spin-like torques are reproduced in a spin valve geometry. Two approaches to modelling interfaces are analysed, one based on the spin mixing conductance and the other based on continuity of spin currents where the spin dephasing length governs the absorption of transverse spin components. I

SUBMITTER: Lepadatu S 

PROVIDER: S-EPMC5636894 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature