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

Magnetization switching by spin-orbit torque in an antiferromagnet-ferromagnet bilayer system.

Spin-orbit torque (SOT)-induced magnetization switching shows promise for realizing ultrafast and reliable spintronics devices. Bipolar switching of the perpendicular magnetization by the SOT is achieved under an in-plane magnetic field collinear with an applied current. Typical structures studied so far comprise a nonmagnet/ferromagnet (NM/FM) bilayer, where the spin Hall effect in the NM is r...

Spin-Orbit Torque Efficiency in Compensated Ferrimagnetic Cobalt-Terbium Alloys

Intrinsic spin torque without spin-orbit coupling.

We derive an intrinsic contribution to the non-adiabatic spin torque for non-uniform magnetic textures. It differs from previously considered contributions in several ways and can be the dominant contribution in some models. It does not depend on the change in occupation of the electron states due to the current flow but rather is due to the perturbation of the electronic states when an electri...

Magnetization Dynamics Symmetry in Spin Torque Induced Magnetization Switching

Magnetization dynamics symmetry plays important roles in magnetization switching. Here we study magnetic field and spin torque induced magnetization switching. Spin moment transferring from polarized itinerant electrons to local magnetization provides a magnetization switching mechanism without using external magnetic field. Besides its importance in fundamental magnetization switching dynamics...

Joule Heating Effect on Field-Free Magnetization Switching by Spin-Orbit Torque in Exchange-Biased Systems

Seyed Armin Razavi, Di Wu, Guoqiang Yu, Yong-Chang Lau, Kin L. Wong, Weihua Zhu, Congli He, Zongzhi Zhang, J. M. D. Coey, Plamen Stamenov, Pedram Khalili Amiri, and Kang L. Wang Department of Electrical Engineering, University of California, Los Angeles, California 90095-1594, USA Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Eng...