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.

arXiv comment6 pages, 4 figures

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Cited by in corpus (6)

• Experimental Evidence of Non-Negligible Imaginary Part of Spin Mixing Conductance and Its Impact on Magnetization Dynamics in Heavy-Metal|Ferromagnet Bilayers
• Voltage-control of damping constant in magnetic-insulator/topological-insulator bilayers
• Giant quadratic magneto-optical response of thin YIG films for sensitive magnetometric experiments
• Enhanced spin transfer torque in platinum/ferromagnetic-metal structures by optimizing the platinum thickness
• Hysteresis and training effect in the electric control of spin current in Pt/Y3Fe5O12 heterostructures
• Spin-orbit torque on nuclear spins exerted by a spin accumulation via hyperfine interactions