〇SINA RANJBAR¹, Masakiyo Tsunoda², Mikihiko Oogane¹, Yasuo Ando^1,3 (1.Department of Applied Physics, Tohoku University, Sendai 980-8579, Japan, 2.Department of Electronic Engineering, Tohoku University, Sendai 980-8579, Japan, 3.Center for Science and Innovation in Spintronics (Core Research Cluster) Organization for Advanced Studies)