[19p-D104-1~6] CS6 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

▼ [19p-D104-3] Dzyaloshinskii-Moriya interaction in an antiferromagnet/ferromagnet heterostructure

〇(P)Samik Duttagupta¹、Takuro Kanemura⁴、Ryuichi Itoh⁴、Aleksandr Kurenkov⁴、Chaoliang Zhang³、Shunsuke Fukami²、Hideo Ohno⁵ (1.CSRN, Tohoku Univ、2.CIES, Tohoku Univ、3.CSIS, Tohoku Univ、4.RIEC, Tohoku Univ、5.WPI-AIMR)

キーワード：Antiferromagnet Spintronics, Spin-Orbit Interaction, Domain wall motion

Antiferromagnet (AFM)/ferromagnet (FM) heterostructures with spin-orbit interaction are perceived to open new opportunities for digital and analogue spintronic applications. In addition to spin-orbit torques generated by an in-plane current, the asymmetry of the stack structure with the spin-orbit interaction results in an interfacial Dzyaloshinskii-Moriya interaction (DMI). A quantitative evaluation of DMI is crucial for understanding of magnetization reversal in these heterostructures. Here, we study AFM PtMn thickness (t_PtMn) dependence of DMI in a PtMn/[Co/Ni] system using two methods, a SOT driven DW motion and a bubble expansion technique, and compare the results to a reference Pt/[Co/Ni] system.