Current-induced spin torque resonance of magnetic insulators affected by   field-like spin-orbit torques and out-of-plane magnetizations
  The spin-torque ferromagnetic resonance (ST-FMR) in a bilayer system consisting of a magnetic insulator such as Y3Fe5O12 and a normal metal with spin-orbit interaction such as Pt is addressed theoretically. We model the ST-FMR for all magnetization directions and in the presence of field-like spin-orbit torques based on the drift-diffusion spin model and quantum mechanical boundary conditions. ST-FMR experiments may expose crucial information about the spin-orbit coupling between currents and magnetization in the bilayers. 
Takahiro Chiba, Michael Schreier, Gerrit E. W. Bauer, and Saburo   Takahashi
cond-mat.mes-hall