Spin-orbit enhanced demagnetization rate in Co/Pt-multilayers

K.C. Kuiper, T. Roth, A.J. Schellekens, O. Schmitt, B. Koopmans, M. Cinchetti, M. Aeschlimann

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44 Citations (Scopus)
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Abstract

In order to explore the role of enhanced spin-orbit interactions on the laser-induced ultrafast magnetization dynamics, we performed a comparative study on cobalt thin films and Co/Pt multilayers. We show that the presence of the Co/Pt interfaces gives rise to a three-fold faster demagnetization upon femtosecond laser heating. Experimental data for a wide range of laser fluences are analyzed using the Microscopic 3-Temperature Model. We find that the Elliott-Yafet spin-flip scattering in the multilayer structure is increased by at least a factor of four with respect to the elementary Co film.
Original languageEnglish
Pages (from-to)202402-1/4
Number of pages4
JournalApplied Physics Letters
Volume105
Issue number20
DOIs
Publication statusPublished - 17 Nov 2014

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