Non-damping magnetization oscillations in a single-domain ferromagnet
  Non-damped oscillations of the magnetization vector of a ferromagnetic system subject to a spin polarized current and an external magnetic field are studied theoretically by solving the Landau-Lifshitz-Gilbert equation. It is shown that the frequency and amplitude of such oscillations can be controlled by means of an applied magnetic field and a spin current. The possibility of injection of the oscillating spin current into a non-magnetic system is also discussed. 
P. M. Gorley, P. P. Horley, V. K. Dugaev, J. Barnas, and V. R. Vieira