Ultrafast single-pulse all-optical switching in synthetic ferrimagnetic Tb/Co/Gd multilayers

Julian Hintermayr (Corresponding author), Pingzhi Li, Roy Rosenkamp, Youri L.W. van Hees, Junta Igarashi, Stéphane Mangin, Reinoud Lavrijsen, Grégory Malinowski, Bert Koopmans

Research output: Contribution to journalArticleAcademicpeer-review


In this work, we investigate single-shot all-optical switching (AOS) in Tb/Co/Gd/Co/Tb multilayers in an attempt to establish AOS in synthetic ferrimagnets with high perpendicular magnetic anisotropy. In particular, we study the effect of varying Tb thicknesses to disentangle the role of the two rare-earth elements. Even though the role of magnetic compensation has been considered to be crucial, we find that the threshold fluence for switching is largely independent of the Tb content. Moreover, we identify the timescale for the magnetization to cross zero to be approximately within the first ps after laser excitation using time-resolved magneto-optic Kerr effect. We conclude that the switching is governed mostly by interactions between Co and Gd.

Original languageEnglish
Article number072406
Number of pages6
JournalApplied Physics Letters
Issue number7
Publication statusPublished - 14 Aug 2023

Bibliographical note

Funding Information:
This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement Nos. 861300 and 860060. This work was also part of the research program Gravitation (ZK) program “Research Center for Integrated Nanophotonics,” which are financed by the Dutch Research Council (NWO). J.I. acknowledges support from JSPS Overseas Research Fellowships. Furthermore, this work was supported by the No. ANR-20-CE09-0013 UFO, the Institute Carnot ICEEL for the project “CAPMAT” and FASTNESS, the Région Grand Est, the Metropole Grand Nancy, for the Chaire PLUS by the impact project LUE-N4S, part of the French PIA project “Lorraine Université d'Excellence” Ref. No. ANR-15-IDEX-04-LUE, the “FEDERFSE Lorraine et Massif Vosges 2014–2020” for IOMA a European Union Program, and the ANR Project No. ANR-20-CE24-0003 SPOTZ.

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© 2023 Author(s).


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