Quantification of the spin-Hall anti-damping torque with a resonance spectrometer

Abstract

We present a simple technique using a cavity-based resonance spectrometer to quantify the anti-damping torque due to the spin Hall effect. Modification of ferromagnetic resonance is observed as a function of small DC current in sub-mm-wide strips of bilayers, consisting of magnetically soft FeGaB and strong spin-Hall metal Ta. From the detected current-induced linewidth change, we obtain an effective spin Hall angle of 0.08-0.09 independent of the magnetic layer thickness. Our results demonstrate that a sensitive resonance spectrometer can be a general tool to investigate spin Hall effects in various material systems, even those with vanishingly low conductivity and magnetoresistance.

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Cited by in corpus (9)

• Comparison of spin-orbit torques and spin pumping across NiFe/Pt and NiFe/Cu/Pt interfaces
• Engineering spin-orbit torque in Co/Pt multilayers with perpendicular magnetic anisotropy
• Spin-orbit torque characterization in a nutshell
• Spin-orbit torque and spin pumping in YIG/Pt with interfacial insertion layers
• Efficient generation of spin currents by the Orbital Hall effect in pure Cu and Al and their measurement by a Ferris-wheel ferromagnetic resonance technique at the wafer level
• Light and microwave driven spin pumping across FeGaB-BiSb interface
• Resonant Precession of Magnetization and Precession -- Induced DC voltages in FeGaB Thin Films
• Determination of the spin Hall angle by the inverse spin Hall effect, device level ferromagnetic resonance, and spin torque ferromagnetic resonance: a comparison of methods
• Current driven second harmonic domain wall resonance in ferromagnetic metal/ nonmagnetic metal bilayer: a field-free method for spin Hall angle measurements