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Laser-Induced Magnetization Dynamics of Lanthanide-Doped Permalloy Thin Films

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Radu, I. ; Woltersdorf, Georg ; Kiessling, M. ; Melnikov, A. ; Bovensiepen, U. ; Thiele, J.-U. ; Back, Christian H.
Date of publication of this fulltext: 27 May 2010 10:34


We investigate the effect of Ho, Dy, Tb, and Gd impurities on the femtosecond laser-induced magnetization dynamics of thin Permalloy films using the time-resolved magneto-optical Kerr effect. Varying the amount of Ho, Dy, Tb content from 0% to 8%, we observe a gradual change of the characteristic demagnetization time constant from approximate to 60 to approximate to 150 fs. In ...


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