10:00 〜 10:15 ▲ [12a-S302-5] Giant tunnel magnetoresistance under bias voltages in a magnetic tunnel junctions with a tri-layered MgO/MgAl2O4/MgO barrier 〇Kenji Nawa1,2、Keisuke Masuda2、Yoshio Miura2 (1.Mie Univ.、2.NIMS)