Observation of Ferromagnetic Resonance in SrRuO$_{3 }$Using the Time-Resolved Magneto-Optical Kerr Effect

ORAL

Abstract

We report the observation of ferromagnetic resonance (FMR) in strontium ruthenate 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 large FMR frequency, 250 GHz, and damping parameter are consistent with strong spin-orbit coupling. The damping coefficient, as well as other parameters associated with the magnetization dynamics, have a non-monotonic temperature dependence, suggestive of a link to the anomalous Hall effect.

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Authors

  • M.C. Langner

    • Dept. of Physics, UC Berkeley and Lawrence Berkeley National Lab

  • C.L.S. Kantner

    • Dept. of Physics, UC Berkeley and Lawrence Berkeley National Lab

  • Y.H. Chu

    • Dept. of Materials Science, UC Berkeley

  • L.W. Martin

    • Dept. of Materials Science, UC Berkeley

  • R. Ramesh

    • Dept. of Physics and Dept. of Materials Science, UC Berkeley

  • J. Orenstein

    • Dept. of Physics, UC Berkeley and Lawrence Berkeley National Lab