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- W2617755263 abstract "Electrical currents in a magnetic-insulator/heavy-metal heterostructure can induce two simultaneous effects, namely, spin Hall magnetoresistance (SMR) on the heavy-metal side and spin-orbit torques (SOTs) on the magnetic-insulator side. Within the framework of a pure spin current model based on the bulk spin Hall effect (SHE), the ratio of the spin Hall-induced anomalous Hall effect (SH-AHE) to SMR should be equal to the ratio of the fieldlike torque (FLT) to the dampinglike torque (DLT). We perform a quantitative study of SMR, SH-AHE, and SOTs in a series of thulium iron garnet/platinum or $mathrm{T}{mathrm{m}}_{3}mathrm{F}{mathrm{e}}_{5}{mathrm{O}}_{12}/mathrm{Pt}$ heterostructures with different $mathrm{T}{mathrm{m}}_{3}mathrm{F}{mathrm{e}}_{5}{mathrm{O}}_{12}$ thicknesses, where $mathrm{T}{mathrm{m}}_{3}mathrm{F}{mathrm{e}}_{5}{mathrm{O}}_{12}$ is a ferrimagnetic insulator with perpendicular magnetic anisotropy. We find the ratio between the measured effective fields of FLT and DLT is at least two times larger than the ratio of the SH-AHE to SMR. In addition, the bulk SHE model grossly underestimates the spin-torque efficiency of FLT. Our results reveal deficiencies of the bulk SHE model and also address the importance of interfacial effects such as the Rashba and magnetic proximity effects in magnetic-insulator/heavy-metal heterostructures." @default.
- W2617755263 created "2017-06-05" @default.
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- W2617755263 date "2017-06-23" @default.
- W2617755263 modified "2023-10-14" @default.
- W2617755263 title "Deficiency of the bulk spin Hall effect model for spin-orbit torques in magnetic-insulator/heavy-metal heterostructures" @default.
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- W2617755263 doi "https://doi.org/10.1103/physrevb.95.241305" @default.
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