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arXiv · 1903.05865

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

Ledong Wang·Zhijian Lu·Jianshu Xue·Peng Shi·Yufeng Tian·Yanxue Chen·Shishen Yan·Lihui Bai·Michael Harder
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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.

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Ledong Wang, Zhijian Lu, Jianshu Xue, Peng Shi, Yufeng Tian, Yanxue Chen, Shishen Yan, Lihui Bai, Michael Harder. 2019-03-14. Electrical control of spin mixing conductance in a Y$_3$Fe$_5$O$_{12}$/Platinum bilayer. https://doi.org/10.1103/physrevapplied.11.044060

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