Observation of ferromagnetic resonance in SrRuO3 by the time-resolved magneto-optical Kerr effect
Langner, M.C., C.L.S. Kantner, Y.H. Chu, L.M. Martin, P. Yu, J. Seidel, Ramamoorthy Ramesh, J. Orenstein
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 anisotropy. The high FMR frequency, 250 GHz, and large Gilbert damping parameter, α 1, are consistent with strong spin-orbit coupling. We find that the parameters associated with the magnetization dynamics, including α, have a nonmonotonic temperature dependence, suggestive of a link to the anomalous Hall effect. © 2009 The American Physical Society.
Physical Review Letters
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