Sign of inverse spin Hall voltages generated by ferromagnetic resonance and temperature gradients in yttrium iron garnet|platinum bilayers

Abstract

We carried out a concerted effort to determine the absolute sign of the inverse spin Hall effect voltage generated by spin currents injected into a normal metal. We focus on yttrium iron garnet (YIG)|platinum bilayers at room temperature, generating spin currents by microwaves and temperature gradients. We find consistent results for different samples and measurement setups that agree with theory. We suggest a right-hand-rule to define a positive spin Hall angle corresponding to with the voltage expected for the simple case of scattering of free electrons from repulsive Coulomb charges.

incorporated additions from the published version

References in corpus (6)

• Direct electronic measurement of the spin Hall effect
• Observation of the Spin-Seebeck Effect in a Ferromagnetic Semiconductor
• Theory of magnon-driven spin Seebeck effect
• Scaling behavior of the spin pumping effect in ferromagnet/platinum bilayers
• Investigation of induced Pt magnetic polarization in Pt/Y3Fe5O12 bilayers
• Intrinsic Spin Hall Effect

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