2026-06-17T20:31:38Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/47642024-07-24T11:08:00Zcom_10259_9476com_10259.4_106com_10259_2604col_10259_9477
Repositorio Institucional de la Universidad de Burgos
author
John, R. .
author
Berritta, M. .
author
Hinzke, D. .
author
Müller, C. .
author
Santos, T. .
author
Ulrichs, H. .
author
Nieves Cordones, Pablo
author
Walowski, J. .
author
Mondal, R. .
author
Chubykalo Fesenko, O.
author
McCord, J. .
author
Oppeneer, P. M. .
author
Nowak, U. .
author
Münzenberg, M. .
2018-03-21T11:00:03Z
2018-03-21T11:00:03Z
2017-06
2045-2322
http://hdl.handle.net/10259/4764
10.1038/s41598-017-04167-w
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.
eng
Attribution 4.0 International
Magnetisation switching of FePt nanoparticle recording medium by femtosecond laser pulses
info:eu-repo/semantics/article
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URL
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