Pattern generation and symbolic dynamics in a nanocontact vortex oscillator.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
30 Jan 2020
30 Jan 2020
Historique:
received:
12
08
2019
accepted:
21
12
2019
entrez:
1
2
2020
pubmed:
1
2
2020
medline:
1
2
2020
Statut:
epublish
Résumé
Harnessing chaos or intrinsic nonlinear behaviours of dynamical systems is a promising avenue toward unconventional information processing technologies. In this light, spintronic devices are promising because of the inherent nonlinearity of magnetization dynamics. Here, we demonstrate experimentally the potential for chaos-based schemes using nanocontact vortex oscillators by unveiling and characterizing their waveform patterns and symbolic dynamics using time-resolved electrical measurements. We dissociate nonlinear deterministic patterns from thermal fluctuations and show that the emergence of chaos results in the unpredictable alternation of well-defined patterns. With phase-space reconstruction techniques, we perform symbolic analyses of the time series and show that the oscillator exhibits maximal entropy and complexity at the centre of its incommensurate region. This suggests that such vortex-based systems are promising nanoscale sources of entropy that could be exploited for information processing.
Identifiants
pubmed: 32001682
doi: 10.1038/s41467-020-14328-7
pii: 10.1038/s41467-020-14328-7
pmc: PMC6992810
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
601Subventions
Organisme : Agence Nationale de la Recherche (French National Research Agency)
ID : ANR-17-CE24- 0008
Organisme : Agence Nationale de la Recherche (French National Research Agency)
ID : ANR-17-CE24- 0008
Organisme : Agence Nationale de la Recherche (French National Research Agency)
ID : ANR-17-CE24- 0008
Organisme : Agence Nationale de la Recherche (French National Research Agency)
ID : ANR-17-CE24- 0008
Organisme : Agence Nationale de la Recherche (French National Research Agency)
ID : ANR-17-CE24- 0008
Organisme : Agence Nationale de la Recherche (French National Research Agency)
ID : ANR-17-CE24- 0008
Organisme : Agence Nationale de la Recherche (French National Research Agency)
ID : ANR-17-CE24- 0008
Organisme : Agence Nationale de la Recherche (French National Research Agency)
ID : ANR-17-CE24- 0008
Organisme : Agence Nationale de la Recherche (French National Research Agency)
ID : ANR-17-CE24- 0008
Organisme : EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020)
ID : 751344
Organisme : EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020)
ID : 751344
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