Nonlinear multi-magnon scattering in artificial spin ice.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
09 Jun 2023
09 Jun 2023
Historique:
received:
07
06
2022
accepted:
24
05
2023
medline:
12
6
2023
pubmed:
10
6
2023
entrez:
9
6
2023
Statut:
epublish
Résumé
Magnons, the quantum-mechanical fundamental excitations of magnetic solids, are bosons whose number does not need to be conserved in scattering processes. Microwave-induced parametric magnon processes, often called Suhl instabilities, have been believed to occur in magnetic thin films only, where quasi-continuous magnon bands exist. Here, we reveal the existence of such nonlinear magnon-magnon scattering processes and their coherence in ensembles of magnetic nanostructures known as artificial spin ice. We find that these systems exhibit effective scattering processes akin to those observed in continuous magnetic thin films. We utilize a combined microwave and microfocused Brillouin light scattering measurement approach to investigate the evolution of their modes. Scattering events occur between resonance frequencies that are determined by each nanomagnet's mode volume and profile. Comparison with numerical simulations reveals that frequency doubling is enabled by exciting a subset of nanomagnets that, in turn, act as nanosized antennas, an effect that is akin to scattering in continuous films. Moreover, our results suggest that tunable directional scattering is possible in these structures.
Identifiants
pubmed: 37296142
doi: 10.1038/s41467-023-38992-7
pii: 10.1038/s41467-023-38992-7
pmc: PMC10256710
doi:
Substances chimiques
Ice
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
3419Subventions
Organisme : National Science Foundation (NSF)
ID : DMR-2011824
Organisme : National Science Foundation (NSF)
ID : DMR-2011824
Organisme : National Science Foundation (NSF)
ID : DMR-2011824
Organisme : National Science Foundation (NSF)
ID : 2205796
Organisme : U.S. Department of Energy (DOE)
ID : DE-SC0020308
Organisme : U.S. Department of Energy (DOE)
ID : DE-SC0020308
Organisme : U.S. Department of Energy (DOE)
ID : DE-SC0020308
Informations de copyright
© 2023. The Author(s).
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