Phase-sensitive detection of spin pumping via the ac inverse spin Hall effect

Abstract

An intriguing feature of spintronics is the use of pure spin-currents to manipulate magnetization, e.g., spin-currents can switch magnetization in spin-torque MRAM, a next-generation DRAM alternative. Giant spin-currents via the spin Hall effect greatly expand the technological opportunities. Conversely, a ferromagnet/normal metal junction emits spin-currents under microwave excitation, i.e. spin-pumping. While such spin-currents are modulated at the excitation frequency, there is also a non-linear, rectified component that is commonly detected using the corresponding inverse spin Hall effect (iSHE) dc voltage. However, the ac component should be more conducive for quantitative analysis, as it is up to two orders of magnitude larger and linear. But any device that uses the ac iSHE is also sensitive to inductive signals via Faraday's Law and discrimination of the ac iSHE signal must rely on phase-sensitive measurements. We use the inductive signal as a reference for a quantitative measurement of the magnitude and phase of the ac iSHE.

References in corpus (6)

• Study of Intrinsic Spin Hall Effect and Orbital Hall Effect in 4d- and 5d- Transition Metals
• Spin Pumping and Inverse Spin Hall Effect in Platinum: The Essential Role of Spin-Memory Loss at Metallic Interfaces
• Spin current and polarization in impure 2D electron systems with spin-orbit coupling
• Giant Orbital Hall Effect in Transition Metals: Origin of Large Spin and Anomalous Hall Effects
• "Phase Diagram" of the Spin Hall Effect
• Spin-Hall Conductivity in Electron-Phonon Coupled Systems

Cited by in corpus (37)

• Dependence of the Efficiency of Spin Hall Torque on the Transparency of Pt-Ferromagnetic Layer Interfaces
• Photoferroelectric oxides
• Electrical Detection of Magnetization Dynamics via Spin Rectification Effects
• Direct and inverse spin-orbit torques
• Measurement of spin pumping voltage separated from extrinsic microwave effects
• Spin-orbit torques from interfacial spin-orbit coupling for various interfaces
• Room temperature antiferromagnetic resonance and inverse spin-Hall voltage in canted antiferromagnets
• Direct detection of pure spin-current by x-ray pump-probe measurements
• Current-induced spin torque resonance of magnetic insulators
• Current-induced spin torque resonance of a magnetic insulator
• Driving and detecting ferromagnetic resonance in insulators with the spin Hall effect
• Spin and spin current -- From fundamentals to recent progress
• Pure spin currents in magnetically ordered insulator/normal metal heterostructures
• Inductive detection of field-like and damping-like AC inverse spin-orbit torques in ferromagnet/normal metal bilayers
• Spin Hall effects due to phonon skew scattering
• Minimal Model of Spin-Transfer Torque and Spin Pumping caused by Spin Hall Effect
• Spin Hall Magnetoimpedance
• Detection of the dc inverse spin Hall effect due to spin pumping in a novel meander-stripline geometry
• Simultaneous Optical and Electrical Spin-Torque Magnetometry with Stroboscopic Detection of Spin-Precession Phase
• Dynamical amplification of magnetoresistances and Hall currents up to the THz regime
• Charge-Spin Interconversion in Epitaxial Pt Probed by Spin-Orbit Torques in a Magnetic Insulator
• Spin transparency for an interface of an ultrathin magnet within the spin dephasing length
• Optically driven spin pumping mediating collective magnetization dynamics in a spin valve structure
• Pumping of magnons in a Dzyaloshinskii-Moriya ferromagnet
• Spin Hall Effect Induced Spin Transfer Through an Insulator
• New pathways towards efficient metallic spin Hall spintronics
• Controlling the orbital Hall effect in gapped bilayer graphene in the terahertz regime
• Macroscale non-local transfer of superconducting signatures to a ferromagnet in a cavity
• Optical spin transport theory of spin-1/2 topological Fermi superfluids
• Direct imaging of the ac component of the pumped spin polarization with element specificity
• Optical spin conductivity in ultracold quantum gases
• Tunable spin-charge conversion through topological phase transitions in zigzag nanoribbons
• Nanomechanical detection of the spin Hall effect
• Dynamic spin-charge coupling: spin Hall magnetoresistance in non-magnetic conductors
• Switching of magnon parametric oscillation by magnetic field direction
• Inductive detection of inverse spin-orbit torques in magnetic heterostructures
• The spin Hall effect