[14a-A501-1~13] 10.2 Fundamental and exploratory device technologies for spin

▼ [14a-A501-12] Antiferromagnetic-coupled metallic superlattice with Ir-doped Cu interlayer generating spin Hall effect

〇Hiroto Masuda¹, Takeshi Seki^1,2, Yong-Chang Lau^1,2, Takahide Kubota^1,2, Koki Takanashi^1,2,3 (1.IMR, Tohoku Univ., 2.CSRN, Tohoku Univ., 3.CSIS, Tohoku Univ.)

Keywords:antiferromagnetic spintronics, metallic superlattice, spin Hall effect

The Co / Cu-Ir / Co superlattice is expected to show both strong antiferromagnetic coupling (AF-coupling) and large spin-orbit torque. In this study, we have investigated AF-coupling for epitaxially grown Co / X / Co tri-layered structures, where X is Cu, Cu₉₅Ir₅ and Ir, and estimated the value of spin Hall angle for Cu₉₅Ir₅. The thickness (t) dependence of AF-coupling strength indicated that AF-coupling for the Cu-Ir interlayer sample was observed in the range of 0.6 nm < t < 1.0 nm. In addition, we have estimated the spin Hall angle of the present Cu-Ir using Co (2 nm) / Cu₉₅Ir₅ (t) bilayer.