[5p-C18-8~21] 【CS.10】10.1 新物質・新機能創成（作製・評価技術）,10.2 スピン基盤技術・萌芽的デバイス技術, 10.3 スピンデバイス・磁気メモリ・ストレージ技術のコードシェアセッション

▲ [5p-C18-18] Spin-Orbit torque in Pt/Co system: effect of naturally oxidized Co layer

〇(D)Yuki Hibino¹、Takamasa Hirai¹、Kento Hasegawa¹、Tomohiro Koyama¹、Daichi Chiba¹ (1.Univ. of Tokyo)

キーワード：spin-orbit torque, metallic multilayers, interfacial effect

Magnetization control via the spin-orbit torque (SOT) in a normal metal (NM)/ferromagnetic material (FM) bilayer structure has been proposed for a new writing method for MRAM devices. Recently, it has been reported that the SOT can be manipulated by the oxygen level of either the FM or layer including the sign reversal of the SOT. In this work, we report the SOT in the Pt/Co system with oxidized Co surface. Quantitative examination of SOT revealed that the oxidation state of Co can largely ehnhance the SOT comparing with the sample with no oxidation state.