12:15 PM - 12:30 PM
▲ [14a-A501-13] Spin Hall effect of non-equilibrium Cu-Ir binary alloy
Keywords:spin Hall effect, Cu, combinatorial technique
We carried out a comprehensive study on the SHE of Cu-Ir binary alloys by exploiting a combinatorial technique based on the thermal imaging for a composition-spread film. We utilized the spin Peltier effect (SPE) as a probe of the spin-charge current conversion. From the thermal images originating from the SPE, we have found that the spin Hall efficiency is maximized at the composition of Cu78Ir22, which corresponds to the non-equilibrium Cu-Ir and is not thermodynamically stable in the bulk phase diagram. We also quantitatively analyzed the spin Hall efficiency for the Cu78Ir22/ Co bilayer. That quantative evaluation suggests that the non-equilibrium Cu-Ir alloy is a candidate of spin Hall material.