Relative weight of the inverse spin Hall and spin rectification effects for metallic Py,Fe/Pt and insulating YIG/Pt bilayers estimated by angular dependent spin pumping measurements

摘要

We quantify the relative weight of inverse spin Hall and spin rectificationeffects occurring in RF-sputtered polycrystalline permalloy, molecular beamepitaxy-grown epitaxial iron and liquid phase epitaxy-grown yttrium-iron-garnetbilayer systems with different capping materials. To distinguish the spinrectification signal from the inverse spin Hall voltage the external magneticfield is rotated in-plane to take advantage of the different angulardependencies of the prevailing effects. We prove that in permalloy anisotropicmagnetoresistance is the dominant source for spin rectification while inepitaxial iron the anomalous Hall effect has an also comparable strength. Therectification in yttrium-iron-garnet/platinum bilayers reveals an angulardependence imitating the one seen for anisotropic magnetoresistance caused byspin Hall magnetoresistance.