Observation of ferromagnetic resonance in strontium ruthenate (SrRuO3)
  We report the observation of ferromagnetic resonance (FMR) in SrRuO3 using the time-resolved magneto-optical Kerr effect. The FMR oscillations in the time-domain appear in response to a sudden, optically induced change in the direction of easy-axis anistropy. The high FMR frequency, 250 GHz, and large Gilbert damping parameter, alpha ~ 1, are consistent with strong spin-orbit coupling. We find that the parameters associated with the magnetization dynamics, including alpha, have a non-monotonic temperature dependence, suggestive of a link to the anomalous Hall effect. 
M. C. Langner, C. L. S. Kantner, Y. H. Chu, L. W. Martin, P. Yu, R.   Ramesh, and J. Orenstein