Skyrmions in synthetic antiferromagnets and their nucleation via electrical current and ultra-fast laser illumination

Roméo Juge, Naveen Sisodia, Joseba Urrestarazu Larrañaga, Qiang Zhang, Pham Van Tuong, Kumari Gaurav Rana, Brice Sarpi, Nicolas Mille, Stefan Stanescu, Rachid Belkhou, Mohamad-Assaad Mawass, Nina Novakovic-Marinkovic, Florian Kronast, Markus Weigand, Joachim Gräfe, Sebastian Wintz, Simone Finizio, Jörg Raabe, Lucia Aballe, Michael Foerster, Mohamed Belmeguenai, Liliana D. Buda-Prejbeanu, Johan Pelloux-Prayer, Justin M. Shaw, Hans T. Nembach, Laurent Ranno, Gilles Gaudin and Olivier Boulle ()
Additional contact information
Roméo Juge: Univ. Grenoble Alpes, CNRS, CEA, SPINTEC
Naveen Sisodia: Univ. Grenoble Alpes, CNRS, CEA, SPINTEC
Joseba Urrestarazu Larrañaga: Univ. Grenoble Alpes, CNRS, CEA, SPINTEC
Qiang Zhang: Univ. Grenoble Alpes, CNRS, CEA, SPINTEC
Pham Van Tuong: Univ. Grenoble Alpes, CNRS, CEA, SPINTEC
Kumari Gaurav Rana: Univ. Grenoble Alpes, CNRS, CEA, SPINTEC
Brice Sarpi: Synchrotron SOLEIL, L’Orme des Merisiers
Nicolas Mille: Synchrotron SOLEIL, L’Orme des Merisiers
Stefan Stanescu: Synchrotron SOLEIL, L’Orme des Merisiers
Rachid Belkhou: Synchrotron SOLEIL, L’Orme des Merisiers
Mohamad-Assaad Mawass: Helmholtz-Zentrum Berlin für Materialien und Energie
Nina Novakovic-Marinkovic: Helmholtz-Zentrum Berlin für Materialien und Energie
Florian Kronast: Helmholtz-Zentrum Berlin für Materialien und Energie
Markus Weigand: Hahn-Meitner-Platz 1
Joachim Gräfe: Max Planck Institute for Intelligent Systems
Sebastian Wintz: Max Planck Institute for Intelligent Systems
Simone Finizio: Swiss Light Source, Paul Scherrer Institut
Jörg Raabe: Swiss Light Source, Paul Scherrer Institut
Lucia Aballe: ALBA Synchrotron Light Facility
Michael Foerster: ALBA Synchrotron Light Facility
Mohamed Belmeguenai: Laboratoire des Sciences des Procedés et des Matériaux, CNRS, Univ. Paris 13
Liliana D. Buda-Prejbeanu: Univ. Grenoble Alpes, CNRS, CEA, SPINTEC
Johan Pelloux-Prayer: Univ. Grenoble Alpes, CNRS, CEA, SPINTEC
Justin M. Shaw: National Institute of Standards and Technology
Hans T. Nembach: National Institute of Standards and Technology
Laurent Ranno: Univ. Grenoble Alpes, CNRS, Institut Néel
Gilles Gaudin: Univ. Grenoble Alpes, CNRS, CEA, SPINTEC
Olivier Boulle: Univ. Grenoble Alpes, CNRS, CEA, SPINTEC

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract Magnetic skyrmions are topological spin textures that hold great promise as nanoscale information carriers in non-volatile memory and logic devices. While room-temperature magnetic skyrmions and their current-induced motion were recently demonstrated, the stray field resulting from their finite magnetisation and their topological charge limit their minimum size and reliable motion. Antiferromagnetic skyrmions allow to lift these limitations owing to their vanishing magnetisation and net zero topological charge, promising ultra-small and ultra-fast skyrmions. Here, we report on the observation of isolated skyrmions in compensated synthetic antiferromagnets at zero field and room temperature using X-ray magnetic microscopy. Micromagnetic simulations and an analytical model confirm the chiral antiferromagnetic nature of these skyrmions and allow the identification of the physical mechanisms controlling their size and stability. Finally, we demonstrate the nucleation of synthetic antiferromagnetic skyrmions via local current injection and ultra-fast laser excitation.

Date: 2022
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Citations: View citations in EconPapers (2)

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DOI: 10.1038/s41467-022-32525-4

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