title: Observation of ferromagnetic resonance in SrRuO3 by the time-resolved magneto-optical Kerr effect.
abstract: 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, alpha approximately 1, are consistent with strong spin-orbit coupling. We find that the parameters associated with the magnetization dynamics, including alpha, have a nonmonotonic temperature dependence, suggestive of a link to the anomalous Hall effect.
authors.affiliation: Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: M C
authors.initials: MC
authors.lastname: Langner
authors.forename: C L S
authors.initials: CL
authors.lastname: Kantner
authors.forename: Y H
authors.initials: YH
authors.lastname: Chu
authors.forename: L M
authors.initials: LM
authors.lastname: Martin
authors.forename: P
authors.initials: P
authors.lastname: Yu
authors.forename: J
authors.initials: J
authors.lastname: Seidel
authors.forename: R
authors.initials: R
authors.lastname: Ramesh
authors.forename: J
authors.initials: J
authors.lastname: Orenstein