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• W4387460008 abstract "Quantitative characterizations of the current-induced spin–orbit torques (SOTs) are vitally important for both fundamental understanding and practical applications of SOT-based spintronic devices. Here, we study effective SOT magnetic fields in a (Ga,Mn)As single film with perpendicular magnetic anisotropy, where we can achieve highly efficient full-magnetization switching with a small critical switching current density Jc as low as 105 A/cm2. Using second harmonic Hall measurements, we estimate the SOT effective fields; the damping-like SOT effective field HDL and the field-like SOT effective field HFL are 22.1 and 18.1 Oe, respectively, at 4 K when a current of 1.43 × 105 A/cm2 is applied to the device. Based on this result, we estimate the corresponding spin-torque efficiencies ξDL and ξFL to be 1.32 and 1.08, respectively, which are one order of magnitude higher than those in conventional metal systems. The high efficiency can be partly attributed to the simple single-functional-layer structure, which can avoid the loss from spin scattering at the interface between different functional layers as observed in conventional SOT devices. Our findings will lay the foundation for studying SOT physics and devices based on ferromagnetic semiconductors." @default.
• W4387460008 created "2023-10-10" @default.
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• W4387460008 date "2023-10-09" @default.
• W4387460008 modified "2023-10-15" @default.
• W4387460008 title "Quantitative characterization of current-induced self-spin–orbit torques in a perpendicularly magnetized (Ga,Mn)As single thin film" @default.
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• W4387460008 doi "https://doi.org/10.1063/5.0170652" @default.
• W4387460008 hasPublicationYear "2023" @default.
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