Temperature dependence of the effective spin-mixing conductance probed with lateral non-local spin valves

Abstract

We report the temperature dependence of the effective spin-mixing conductance between a normal metal (aluminium, Al) and a magnetic insulator (${\text{Y}}_3{\text{Fe}}_5{\text{O}}_{12}$, YIG). Non-local spin valve devices, using Al as the spin transport channel, were fabricated on top of YIG and SiO${}_2$ substrates. By comparing the spin relaxation lengths in the Al channel on the two different substrates, we calculate the effective spin-mixing conductance ($G_{\text{s}}$) to be $3.3\times 10^{12}$~${\Omega }^{-1}{\text{m}}^{-2}$ at 293~K for the Al/YIG interface. A decrease of up to 84\% in $G_{\text{s}}$ is observed when the temperature ($T$) is decreased from 293~K to 4.2~K, with $G_{\text{s}}$ scaling with $(T/T_{\text{c}}{)}^{3/2}$. The real part of the spin-mixing conductance ($G_{\text{r}}\approx 5.7\times 10^{13}{\Omega }^{-1}{\text{m}}^{-2}$), calculated from the experimentally obtained $G_{\text{s}}$, is found to be approximately independent of the temperature. We evidence a hitherto unrecognized underestimation of $G_{\text{r}}$ extracted from the modulation of the spin signal by rotating the magnetization direction of YIG with respect to the spin accumulation direction in the Al channel, which is found to be 50 times smaller than the calculated value.

References in corpus (33)

• Spintronics: Fundamentals and applications
• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
• Enhanced Gilbert Damping in Thin Ferromagnetic Films
• Spin Transfer Torques
• Spin Seebeck insulator
• Spin Hall Magnetoresistance Induced by a Non-Equilibrium Proximity Effect
• Long distance transport of magnon spin information in a magnetic insulator at room temperature
• Theory of spin Hall magnetoresistance
• Anatomy of Spin-Transfer Torque
• Finite-element theory of transport in ferromagnet-normal metal systems
• Spin Injection and Detection in Magnetic Nanostructures
• Non-collinear Magnetoelectronics
• Magnon spin transport driven by the magnon chemical potential in a magnetic insulator
• Spin Torques in Ferromagnetic/Normal Metal Structures
• Spin-Hall Magnetoresistance in Platinum on Yttrium Iron Garnet: Dependence on platinum thickness and in-plane/out-of-plane magnetization
• Observation of the spin Peltier effect
• Spin transfer torque on magnetic insulators
• Spin convertance at magnetic interfaces
• Exchange magnetic field torques in YIG/Pt bilayers observed by the spin-Hall magnetoresistance
• Long-distance spin transport in a disordered magnetic insulator
• Role of spin mixing conductance in spin pumping: enhancement of spin pumping efficiency in Ta/Cu/Py structures
• Temperature dependent spin transport properties of Platinum inferred from spin Hall magnetoresistance measurements
• Spin Injection and Detection via the Anomalous Spin Hall Effect in a Ferromagnetic Metal
• Interfacial Spin and Heat Transfer between Metals and Magnetic Insulators
• Competing effects at Pt/YIG interfaces: spin Hall magnetoresistance, magnon excitations and magnetic frustration
• Efficient injection and detection of out-of-plane spins via the anomalous spin Hall effect in permalloy nanowires
• Spin Seebeck power generators
• Spin transfer due to quantum fluctuations of magnetization
• Modulation of pure spin currents with a ferromagnetic insulator
• Control of spin current by a magnetic YIG substrate in NiFe/Al nonlocal spin valves
• Anisotropic Hanle lineshape via anisotropic magnetothermoelectric phenomena
• Detection of the interfacial exchange field at a ferromagnetic insulator-nonmagnetic metal interface with pure spin currents

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• Theory of Spin Hall Magnetoresistance from a Microscopic Perspective
• Strong interfacial exchange field in a heavy metal/ferromagnetic insulator system determined by spin Hall magnetoresistance
• Current direction anisotropy of the spin Hall magnetoresistance in nickel ferrite thin films with bulk-like magnetic properties
• Magnonic spin Joule heating and rectification effects
• Low Temperature Suppression of the Spin Nernst Angle in Pt
• Monte Carlo simulations of spin transport in nanoscale In${}_{0.7}$Ga${}_{0.3}$As transistors: Temperature and size effects