2024-03-29T05:08:45Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/47642023-03-31T12:40:46Zcom_10259_4759com_10259_2604col_10259_4760
John, R. .
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Berritta, M. .
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Hinzke, D. .
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Müller, C. .
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Santos, T. .
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Ulrichs, H. .
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Nieves Cordones, Pablo
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0000-0002-6633-9643
Walowski, J. .
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Mondal, R. .
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Chubykalo Fesenko, O.
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McCord, J. .
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Oppeneer, P. M. .
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Nowak, U. .
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Münzenberg, M. .
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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.
EC under Contract No. 281043, FemtoSpin. The work at Greifswald University
was supported by the German research foundation (DFG), projects MU MU 1780/8-1, MU 1780/10-1. Research
at Göttingen University was supported via SFB 1073, Projects A2 and B1. Research at Uppsala University was
supported by the Swedish Research Council (VR), the Röntgen-Ångström Cluster, the Knut and Alice Wallenberg
Foundation (Contract No. 2015.0060), and Swedish National Infrastructure for Computing (SNIC). Research at
Kiel University was supported by the DFG, projects MC 9/9-2, MC 9/10-2. P.N. acknowledges support from EU
Horizon 2020 Framework Programme for Research and Innovation (2014-2020) under Grant Agreement No.
686056, NOVAMAG. The work in Konstanz was supported via the Center for Applied Photonics.
application/pdf
eng
Nature Publishing Group
Scientific Reports. 2017, 7, art. 4114
https://doi.org/10.1038/s41598-017-04167-w
info:eu-repo/grantAgreement/EC/H2020/686056
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
Magnetisation switching of FePt nanoparticle recording medium by femtosecond laser pulses
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
CC-LICENSE
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2023-03-31 14:40:46.167
Repositorio Institucional de la Universidad de Burgos
bubrep@ubu.es
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