Electrical control of spin mixing conductance in a Y${}_3$Fe${}_5$O${}_{12}$/Platinum bilayer

Abstract

We report a tunable spin mixing conductance, up to $\pm 22\%$, in a Y${}_3$Fe${}_5$O${}_{12}$/Platinum (YIG/Pt) bilayer.This control is achieved by applying a gate voltage with an ionic gate technique, which exhibits a gate-dependent ferromagnetic resonance line width. Furthermore, we observed a gate-dependent spin pumping and spin Hall angle in the Pt layer, which is also tunable up to $\pm$ 13.6\%. This work experimentally demonstrates spin current control through spin pumping and a gate voltage in a YIG/Pt bilayer, demonstrating the crucial role of the interfacial charge density for the spin transport properties in magnetic insulator/heavy metal bilayers.

6 pages, 4 figures

References in corpus (3)

• Surface state dominated spin-charge current conversion in topological insulator/ferromagnetic insulator heterostructures
• Long-distance spin transport in a disordered magnetic insulator
• Enhancement of Pure Spin Currents in Spin Pumping Y3Fe5O12/Cu/metal Trilayers through Spin Conductance Matching