[19a-D104-1~11] CS6 10.1 & 10.2 & 10.3 Code-sharing session

▼ [19a-D104-6] An effect of electric field on a cone angle at an easy-cone state in CoFeB/MgO stack investigated by ferromagnetic resonance

〇Atsushi Okada¹, Shun Kanai^1,2,3, Shunsuke Fukami^1,2,3,4, Hideo Sato^1,2,3,4, Hideo Ohno^1,2,3,4,5 (1.RIEC, Tohoku Univ., 2.CSIS, Tohoku Univ., 3.CSRN, Tohoku Univ., 4.CIES, Tohoku Univ., 5.WPI-AIMR, Tohoku Univ.)

Keywords:electric field effect, easy cone, CoFeB/MgO

We investigate temperature and electric-field dependence of magnetic anisotropy in CoFeB/ MgO shows easy-cone state below 200 K. Anisotropy fields H_K1^eff and H_K2 increase with decreasing temperature. In all temperature range we measured, application of positive electric field decreases H_K1^eff and it does not alter H_K2 virtually. Cone angle of easy-cone state is also changed and it increases with positive electric field (~10 degrees with E = 0.1 V/nm).