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Spin-Orbit Torque in Structures With Magnetization-Compensated MnGa/Co2MnSi Bilayer

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Title: Spin-Orbit Torque in Structures With Magnetization-Compensated MnGa/Co2MnSi Bilayer
Authors: Hara, Takuya Browse this author
Jono, Kohey Browse this author
Yamanouchi, Michihiko Browse this author →KAKEN DB
Uemura, Tetsuya Browse this author →KAKEN DB
Keywords: Co2MnSi (CMS)
MnxGa1 (MnGa)
spin-orbit torque (SOT)
synthetic antiferromagnetic (SAF) structure
Issue Date: Aug-2022
Publisher: IEEE (Institute of Electrical and Electronics Engineers)
Journal Title: IEEE transactions on magnetics
Volume: 58
Issue: 8
Start Page: 1400104
Publisher DOI: 10.1109/TMAG.2021.3139899
Abstract: We have systematically investigated the spin-orbit torque (SOT)-induced effective magnetic field in a structure consisting of a Ta heavy metal layer and an antiferromagnetically coupled Mn1.8Ga1/Co2MnSi (CMS) bilayer around the magnetization compensation point by varying CMS film thickness. The efficiency of SOT generation takes the maximum around the compensation point, and it is approximately six times as large compared with that in the devices with a MnGa single structure. The enhancement of SOT efficiency can be explained mainly by the reduction in saturation magnetic moment around the compensation point. Moreover, a significant enhancement of the effective spin Hall angle was observed around the compensation point because of the inversion of the magnetization configuration before and after the compensation point.
Rights: © 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Type: article (author version)
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 植村 哲也

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