Inverse Spin Hall Effect enhancement in Pt layer doped by Ge

Abstract We systematic studied the spin pumping (SP) and inverse spin Hall effects (ISHE) in yttrium iron garnet Y 3 Fe 5 O 12 (YIG)/PtGe bilayer using a coplanar waveguide based broadband ferromagnetic resonance setup. More efficient spin injection occurs at the YIG/PtGe interface. The spin Hall angle of Pt (4.4%) and PtGe (9%) are obtained from the metal layer thickness dependent inverse spin Hall voltage measurement. PtGe films are promising materials with large spin Hall angles for future spintronics applications.