Current-induced spin torque resonance of magnetic insulators

Abstract

We formulate a theory of the AC spin Hall magnetoresistance (SMR) in a bilayer system consisting of a magnetic insulator such as yttrium iron garnet (YIG) and a heavy metal such as platinum (Pt). 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 AC spin Hall effect.

5 pages, 4 figures

References in corpus (3)

• Theory of spin Hall magnetoresistance
• Spin-transfer-driven ferromagnetic resonance of individual nanomagnets
• Sign of inverse spin Hall voltages generated by ferromagnetic resonance and temperature gradients in yttrium iron garnet|platinum bilayers

Cited by in corpus (7)

• Simultaneous detection of the spin-Hall magnetoresistance and the spin-Seebeck effect in Platinum and Tantalum on Yttrium Iron Garnet
• Measurement of spin pumping voltage separated from extrinsic microwave effects
• Insulating nanomagnets driven by spin torque
• Deficiency of the Bulk Spin Hall Effect Model for Spin-Orbit Torques in Magnetic Insulator/Heavy Metal Heterostructures
• Current-induced spin torque resonance of magnetic insulators affected by field-like spin-orbit torques and out-of-plane magnetizations
• Phase-resolved electrical detection of coherently coupled magnonic devices
• Antiferromagnetic resonance excited by oscillating electric currents