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

Julian Hintermayr; Pingzhi Li; Roy Rosenkamp; Youri L.W. van Hees; Junta Igarashi; Stéphane Mangin; Reinoud Lavrijsen; Grégory Malinowski; Bert Koopmans

doi:10.1063/5.0161322

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

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Abstract

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 language	English
Article number	072406
Number of pages	6
Journal	Applied Physics Letters
Volume	123
Issue number	7
DOIs	https://doi.org/10.1063/5.0161322
Publication status	Published - 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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10.1063/5.0161322

072406_1_5.0161322Final published version, 1.48 MBLicence: CC BY

Cite this

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title = "Ultrafast single-pulse all-optical switching in synthetic ferrimagnetic Tb/Co/Gd multilayers",

abstract = "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.",

author = "Julian Hintermayr and Pingzhi Li and Roy Rosenkamp and {van Hees}, {Youri L.W.} and Junta Igarashi and St{\'e}phane Mangin and Reinoud Lavrijsen and Gr{\'e}gory Malinowski and Bert Koopmans",

note = "Funding Information: This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sk{\l}odowska-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 R{\'e}gion Grand Est, the Metropole Grand Nancy, for the Chaire PLUS by the impact project LUE-N4S, part of the French PIA project “Lorraine Universit{\'e} 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. Publisher Copyright: {\textcopyright} 2023 Author(s).",

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AU - Hintermayr, Julian

AU - Li, Pingzhi

AU - Rosenkamp, Roy

AU - van Hees, Youri L.W.

AU - Igarashi, Junta

AU - Mangin, Stéphane

AU - Lavrijsen, Reinoud

AU - Malinowski, Grégory

AU - Koopmans, Bert

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N2 - 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.

AB - 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.

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

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Reports from Eindhoven University of Technology Advance Knowledge in Applied Physics (Ultrafast single-pulse all-optical switching in synthetic ferrimagnetic Tb/Co/Gd multilayers)

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

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Reports from Eindhoven University of Technology Advance Knowledge in Applied Physics (Ultrafast single-pulse all-optical switching in synthetic ferrimagnetic Tb/Co/Gd multilayers)

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