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

Abstract

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-ordered structure on MgO(001) substrates. The SOT was characterized by harmonic Hall measurements in a Co2MnGa/Ti/CoFeB heterostructure and a relatively large spin Hall efficiency of -7.8% was obtained.The SOT-induced magnetization switching of the perpendicularly magnetized CoFeB layer was further demonstrated using the structure. The symmetry of second harmonic signals, thickness dependence of spin Hall efficiency, and shift of anomalous Hall loops under applied currents were also investigated. This study not only contributes to the understanding of the mechanisms of spin-current generation from magnetic-WSM-based heterostructures, but also paves a way for the applications of magnetic WSMs in spintronic devices.

arXiv comment15 pages, 4 figures

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Cited by in corpus (8)

• All-electrical switching of a topological non-collinear antiferromagnet at room temperature
• Spin Hall effect in a spin-1 chiral semimetal
• Gigantic Anisotropy of Self-Induced Spin-Orbit Torque in Weyl Ferromagnet Co2MnGa
• Ultra-low-current-density single-layer magnetic Weyl semimetal spin Hall nano-oscillators
• Enhancement of Spin-Charge Conversion Efficiency for Co${}_3$Sn${}_2$S${}_2$ across Transition from Paramagnetic to Ferromagnetic Phase
• Current-induced torques in magnetic Weyl semimetal tunnel junctions
• Deposition temperature dependence of thermo-spin and magneto-thermoelectric conversion in Co${}_2$MnGa films on Y${}_3$Fe${}_5$O${}_{12}$ and Gd${}_3$Ga${}_5$O${}_{12}$
• Influence of chemical ordering on magnetocrystalline anisotropy and magnetoelastic properties in Weyl magnetic semimetal Co2MnGa thin films