[10p-Z08-1~10] 10.2 Fundamental and exploratory device technologies for spin

▲ [10p-Z08-5] Spin Hall effect in non-equilibrium Cu-based binary alloys

〇Hiroto Masuda¹, Rajkumar Modak², Takeshi Seki^1,2,3, Ken-ichi Uchida^1,2,3, Yong Chang Lau^1,3, Yuya Sakuraba^2,4, Ryo Iguchi², Koki Takanashi^1,3,5 (1.IMR, Tohoku Univ., 2.NIMS, 3.CSRN, Tohoku Univ., 4.JST PRESTO, 5.CSIS, Tohoku Univ.)

Keywords:Spin Hall effect, Combinatorial technique, Non-equilibrium alloy

In this study, we comprehensively carried out a study on the spin Hall effect of non-equilibrium Cu-Ir and Cu-Bi binary alloys by exploiting a combinatorial technique based on the thermal imaging for a composition-spread film. We have found that the optimum Ir concentration for enhancing SHE of Cu-Ir is around 25 at.%. We evaluated spin Hall angle of Cu₇₆Ir₂₄ to be 6.29± 0.19 % using the harmonic Hall voltage measurements. On the other hand, the Cu-Bi binary alloys showed no remarkable SHE.