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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/4764

    Título
    Magnetisation switching of FePt nanoparticle recording medium by femtosecond laser pulses
    Autor
    John, R. .
    Berritta, M. .
    Hinzke, D. .
    Müller, C. .
    Santos, T. .
    Ulrichs, H. .
    Nieves Cordones, PabloUBU authority Orcid
    Walowski, J. .
    Mondal, R. .
    Chubykalo Fesenko, O.
    McCord, J. .
    Oppeneer, P. M. .
    Nowak, U. .
    Münzenberg, M. .
    Publicado en
    Scientific Reports. 2017, 7, art. 4114
    Editorial
    Nature Publishing Group
    Fecha de publicación
    2017-06
    ISSN
    2045-2322
    DOI
    10.1038/s41598-017-04167-w
    Abstract
    Manipulation of magnetisation with ultrashort laser pulses is promising for information storage device applications. The dynamics of the magnetisation response depends on the energy transfer from the photons to the spins during the initial laser excitation. A material of special interest for magnetic storage are FePt nanoparticles, for which switching of the magnetisation with optical angular momentum was demonstrated recently. The mechanism remained unclear. Here we investigate experimentally and theoretically the all-optical switching of FePt nanoparticles. We show that the magnetisation switching is a stochastic process. We develop a complete multiscale model which allows us to optimize the number of laser shots needed to switch the magnetisation of high anisotropy FePt nanoparticles in our experiments. We conclude that only angular momentum induced optically by the inverse Faraday effect will provide switching with one single femtosecond laser pulse.
    URI
    http://hdl.handle.net/10259/4764
    Versión del editor
    https://doi.org/10.1038/s41598-017-04167-w
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    • Artículos ICCRAM
    Attribution 4.0 International
    Documento(s) sujeto(s) a una licencia Creative Commons Attribution 4.0 International
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