Size effect on single pulse all-optical helicity-independent switching in GdFeCo disk arrays

Gweha Nyoma, Danny Petty; Vergès, Maxime; Hehn, Michel; Lacour, Daniel; Hohlfeld, Julius; van Dijken, Sebastiaan; Malinowski, Grégory; Mangin, Stéphane; Montaigne, François

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Size effect on single pulse all-optical helicity-independent switching in GdFeCo disk arrays

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Title:	Size effect on single pulse all-optical helicity-independent switching in GdFeCo disk arrays
Author(s):	Gweha Nyoma, Danny Petty ; Vergès, Maxime ; Hehn, Michel ; Lacour, Daniel ; Hohlfeld, Julius ; van Dijken, Sebastiaan ; Malinowski, Grégory ; Mangin, Stéphane ; Montaigne, François
Date:	2023-07-31
Language:	en
Department:	Université de Lorraine Nanomagnetism and Spintronics Department of Applied Physics
Series:	Applied Physics Letters, Volume 123, issue 5
ISSN:	0003-6951 1077-3118
DOI-number:	10.1063/5.0150250
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Citation: Gweha Nyoma , D P , Vergès , M , Hehn , M , Lacour , D , Hohlfeld , J , van Dijken , S , Malinowski , G , Mangin , S & Montaigne , F 2023 , ' Size effect on single pulse all-optical helicity-independent switching in GdFeCo disk arrays ' , Applied Physics Letters , vol. 123 , no. 5 , 052405 . https://doi.org/10.1063/5.0150250
Abstract: We experimentally demonstrate single pulse toggle switching of the magnetization of GdFeCo disks with perpendicular to film plane anisotropy, which diameter ranges from 3 μm to 400 nm using 35 fs linearly polarized laser pulses. Two different magnetic states can be observed depending on the laser fluence: either a deterministic switching of the disk magnetization or a randomly oriented disk. We report that the fluence required to observe both magnetic states show a non-monotonic behavior with disk diameter and that the smallest disks require the lowest minimum fluence for achieving single pulse all-optical helicity-independent switching. Different evolution of the fluence thresholds for both phenomenon as a function of the disk size is observed and discussed.

Description: Funding Information: This work was supported partly by the French PIA project “Lorraine Université d'Excellence” (No. ANR-15-IDEX-04-LUE) and by the “FEDER-FSE Lorraine et Massif Vosges 2014–2020,” a European Union Program (RaNGE project). This work was supported by the No. ANR-20-CE09-0013 UFO, by the Institute Carnot ICEEL for the project “CAPMAT” and FASTNESS, by the Région Grand Est, by the Metropole Grand Nancy, for the Chaire PLUS by the European Union's Horizon 2020 research and innovation program COMRAD under the Marie Skłodowska-Curie Grant Agreement No. 861300, and by the Academy of Finland (Grant No. 316857). This article is based upon work from COST Action CA17123 MAGNETOFON, supported by COST (European Cooperation in Science and Technology). Devices in the present study were patterned at MiNaLor clean-room platform, which is partially supported by FEDER and Grand Est Region through the RaNGE project. Publisher Copyright: © 2023 Author(s).
Permanent link to this item: http://urn.fi/URN:NBN:fi:aalto-202308234965 Email this Export to RefWorks QR Code Print BibTex Tweet