Giant facet-dependent spin-orbit torque and spin Hall conductivity in the triangular antiferromagnet IrMn₃.

ABSTRACT: There has been considerable interest in spin-orbit torques for the purpose of manipulating the magnetization of ferromagnetic elements for spintronic technologies. Spin-orbit torques are derived from spin currents created from charge currents in materials with significant spin-orbit coupling that propagate into an adjacent ferromagnetic material. A key challenge is to identify materials that exhibit large spin Hall angles, that is, efficient charge-to-spin current conversion. Using spin torque ferromagnetic resonance, we report the observation of a giant spin Hall angle [Formula: see text] of up to ~0.35 in (001)-oriented single-crystalline antiferromagnetic IrMn₃ thin films, coupled to ferromagnetic permalloy layers, and a [Formula: see text] that is about three times smaller i

SUBMITTER: Zhang W 

PROVIDER: S-EPMC5045270 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature