open access

https://hdl.handle.net/2115/86827

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

英語

synthetic antiferromagnetic (SAF) structure

2022-08

IEEE (Institute of Electrical and Electronics Engineers)

IEEE transactions on magnetics

58(8)

1400104

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.

学術雑誌論文

Accepted Manuscript

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0018-9464

AA00667933