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This study reports the magnetization switching induced by spin-orbit torque(SOT) from the spin current generated in Co2MnGa magnetic Weyl semimetal (WSM)thin films. We deposited epitaxial Co2MnGa thin films with highly B2-orderedstructure on MgO(001) substrates. The SOT was characterized by harmonic Hallmeasurements in a Co2MnGa/Ti/CoFeB heterostructure and a relatively large spinHall efficiency of -7.8% was obtained.The SOT-induced magnetization switchingof the perpendicularly magnetized CoFeB layer was further demonstrated usingthe structure. The symmetry of second harmonic signals, thickness dependence ofspin Hall efficiency, and shift of anomalous Hall loops under applied currentswere also investigated. This study not only contributes to the understanding ofthe mechanisms of spin-current generation from magnetic-WSM-basedheterostructures, but also paves a way for the applications of magnetic WSMs inspintronic devices.

Magnetization switching induced by spin-orbit torque from Co2MnGa magnetic Weyl semimetal thin films