[15a-3A-1~11] 10.2 スピントルク・スピン流・回路・測定技術

▲ [15a-3A-2] Spin-orbit torque induced switching in an antiferromagnet/ferromagnet heterostructure

〇Shunsuke Fukami^1,2, Chaoliang Zhang³, Samik DuttaGupta³, Hideo Ohno^1,2,3,4 (1.CSIS, Tohoku Univ., 2.CIES, Tohoku Univ., 3.RIEC, Tohoku Univ., 4.WPI-AIMR, Tohoku Univ.)

キーワード：Spin-orbit torque,Antiferromagnet

We study a magnetization reversal induced by spin-orbit torque in an antiferromagnet/ferromagnet heterostructure. We prepare Hall devices made of antiferromagnetic PtMn and ferromagnetic Co/Ni multilayer and evaluate the switching properties induced by the spin-ortib torque generated by the channel current. While an in-plane magnetic field is required for bipolar switching for the conventional structure with nonmagnetic/ferromagnetic heterostructure, it is found that the field is not required owing to the exchange-bias effect of the antiferromagnetic PtMn.