[14p-PA1-1~74] 10 スピントロニクス・マグネティクス

▲ [14p-PA1-65] Current-induced switching of exchange bias under external magnetic field in Pt/IrMn/CoFeB system

〇Kento Hasegawa¹、Tomohiro Koyama^2,3、Daichi Chiba^2,3 (1.The Univ. of Tokyo、2.ISIR, Osaka Univ.、3.CSRN, Osaka Univ.)

キーワード：Exchange bias, spin-orbit torque

The exchange bias (EB) effect in ferromagnet/antiferromagnet heterostructures is important for many spintronic applications, such as magnetic random access memories. In general, the EB is induced by field cooling process, where a system is heated above the blocking temperature followed by cooling in external magnetic field to align magnetization of ferromagnetic layer. However, recent reports achieved a current induced reversal of EB by spin-orbit torque under zero magnetic field. In this study, we have investigated the switching behavior of EB by injecting current pulse under external magnetic field.