Current-Induced Spin-Torque Resonance of Magnetic Insulators

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55 Citations (Scopus)


We formulate a theory of the ac spin Hall magnetoresistance in a bilayer system consisting of a magnetic insulator such as yttrium iron garnet and a heavy metal such as platinum. We derive expressions for the dc voltage generation based on the drift-diffusion spin model and quantum mechanical boundary condition at the interface that reveal a spin-torque ferromagnetic resonance (ST-FMR). We predict that ST-FMR experiments will reveal valuable information on the current-induced magnetization dynamics of magnetic insulators and the ac spin Hall effect.

Original languageEnglish
Article number034003
JournalPhysical Review Applied
Issue number3
Publication statusPublished - 2014 Sept 3


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