Skyrmions in synthetic antiferromagnets and their nucleation via electrical current and ultra-fast laser illumination.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
16 Aug 2022
16 Aug 2022
Historique:
received:
25
10
2021
accepted:
03
08
2022
entrez:
16
8
2022
pubmed:
17
8
2022
medline:
17
8
2022
Statut:
epublish
Résumé
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.
Identifiants
pubmed: 35974009
doi: 10.1038/s41467-022-32525-4
pii: 10.1038/s41467-022-32525-4
pmc: PMC9381802
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
4807Subventions
Organisme : United States Department of Defense | Defense Advanced Research Projects Agency (DARPA)
ID : MIPR# HR0011831554
Organisme : Agence Nationale de la Recherche (French National Research Agency)
ID : ANR-17-CE24-0045
Informations de copyright
© 2022. The Author(s).
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