[PS-12-18] Influence of Si Surface on Spin Accumulation and Transport Signals in CoFe/MgO/n+-Si Junctions ○M. Ishikawa1, H. Sugiyama1, T. Inokuchi1, K. Hamaya2, N. Tezuka3, Y. Saito1 (1.Toshiba Corp., 2.Osaka Univ., 3.Tohoku Univ.(Japan))