Hot-electrons-induced ultrafast demagnitization in Co/Pt multilayers

N. Bergeard, M. Hehn, S. Mangin, G. Lengaigne, F. Montaigne, M. L. M. Lalieu, B. Koopmans, G. Malinowski

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Abstract

Using specially engineered structures to tailor the optical absorption in a metallic multilayer, we analyze the magnetization dynamics of a Co/Pt multilayer buried below a thick Cu layer. We demonstrate that hot electrons alone can very efficiently induce ultrafast demagnetization. Simulations based on hot electron ballistic transport implemented within a microscopic model that accounts for local dissipation of angular momentum nicely reproduce the experimental results, ruling out contribution of pure thermal transport
Original languageEnglish
Article number147203
Pages (from-to)1-5
Number of pages5
JournalPhysical Review Letters
Volume117
Issue number14
DOIs
Publication statusPublished - 29 Sep 2016

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