The Spin Nernst effect in Tungsten

Abstract

The spin Hall effect allows generation of spin current when charge current is passed along materials with large spin orbit coupling. It has been recently predicted that heat current in a non-magnetic metal can be converted into spin current via a process referred to as the spin Nernst effect. Here we report the observation of the spin Nernst effect in W. In W/CoFeB/MgO heterostructures, we find changes in the longitudinal and transverse voltages with magnetic field when temperature gradient is applied across the film. The field-dependence of the voltage resembles that of the spin Hall magnetoresistance. A comparison of the temperature gradient induced voltage and the spin Hall magnetoresistance allows direct estimation of the spin Nernst angle. We find the spin Nernst angle of W to be similar in magnitude but opposite in sign with its spin Hall angle. Interestingly, under an open circuit condition, such sign difference results in spin current generation larger than otherwise. These results highlight the distinct characteristics of the spin Nernst and spin Hall effects, providing pathways to explore materials with unique band structures that may generate large spin current with high efficiency.

References in corpus (14)

• Spin Seebeck insulator
• Theory of spin Hall magnetoresistance
• Observation of the Spin-Seebeck Effect in a Ferromagnetic Semiconductor
• Study of Intrinsic Spin Hall Effect and Orbital Hall Effect in 4d- and 5d- Transition Metals
• Theory of magnon-driven spin Seebeck effect
• Universal Scaling Behavior of Anomalous Hall Effect and Anomalous Nernst Effect in Itinerant Ferromagnets
• Non-collinear Magnetoelectronics
• Mott Relation for Anomalous Hall and Nernst effects in Ga1-xMnxAs Ferromagnetic Semiconductors
• Observation of the spin Nernst effect
• Spin Nernst effect and Nernst effect in two-dimensional electron systems
• Anomalous Hall effect in YIG$|$Pt bilayers
• Ferroic collinear multilayer magnon spin valve
• Intrinsic magnetoresistance in metal films on ferromagnetic insulators
• Spin-orbit torques in L1${}_0$-FePt/Pt thin films driven by electrical and thermal currents

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