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Stochastic dynamics of strongly-bound magnetic vortex pairs
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics.
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics.
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics.ORCID iD: 0000-0002-9993-4748
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2017 (English)In: AIP Advances, ISSN 2158-3226, E-ISSN 2158-3226, Vol. 7, no 5, article id 056007Article in journal (Refereed) Published
Abstract [en]

We demonstrate that strongly-bound spin-vortex pairs exhibit pronounced stochastic behaviour. Such dynamics is due to collective magnetization states originating from purely dipolar interactions between the vortices. The resulting thermal noise exhibits telegraph-like behaviour, with random switching between different oscillation regimes observable at room temperature. The noise in the system is further studied by varying the external field and observing the related changes in the frequency of switching and the probability for different magnetic states and regimes. Monte Carlo simulations are used to replicate and explain the experimental observations.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2017. Vol. 7, no 5, article id 056007
Keywords [en]
Intelligent systems, Monte Carlo methods, Stochastic systems, Collective magnetization, Dipolar interaction, External fields, Magnetic state, Magnetic vortices, Random switching, Stochastic dynamics, Vortex pair
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-200848DOI: 10.1063/1.4974066ISI: 000402797100164Scopus ID: 2-s2.0-85009456825OAI: oai:DiVA.org:kth-200848DiVA, id: diva2:1071603
Note

QC 20170206

Available from: 2017-02-06 Created: 2017-02-03 Last updated: 2017-11-29Bibliographically approved

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Bondarenko, Artem V.Holmgren, ErikKoop, Björn C.Descamps, ThomasKorenivski, Vladislav
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