Physics – Condensed Matter – Materials Science
Scientific paper
2010-08-03
Physics
Condensed Matter
Materials Science
Scientific paper
We report time-resolved Kerr effect measurements of magnetization dynamics in ferromagnetic SrRuO3. We observe that the demagnetization time slows substantially at temperatures within 15K of the Curie temperature, which is ~ 150K. We analyze the data with a phenomenological model that relates the demagnetization time to the spin flip time. In agreement with our observations the model yields a demagnetization time that is inversely proportional to T-Tc. We also make a direct comparison of the spin flip rate and the Gilbert damping coefficient showing that their ratio very close to kBTc, indicating a common origin for these phenomena.
Blok Jeroen L.
Kantner C. L. S.
Koster Gertjan
Langner M. C.
Orenstein Joe
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