Stochastic dynamics of strongly-bound magnetic vortex pairs | Zendy

A. V. Bondarenko | Zendy; Erik Holmgren | Zendy; Ben F. Koop | Zendy; Thomas Descamps | Zendy; B. A. Ivanov | Zendy; V. Korenivski | Zendy

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Stochastic dynamics of strongly-bound magnetic vortex pairs

Author(s) -

A. V. Bondarenko,

Erik Holmgren,

Ben F. Koop,

Thomas Descamps,

B. A. Ivanov,

V. Korenivski

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4974066

Subject(s) - vortex , physics , noise (video) , monte carlo method , condensed matter physics , oscillation (cell signaling) , observable , magnetization , magnetization dynamics , dipole , statistical physics , thermal fluctuations , magnetic field , quantum mechanics , chemistry , mechanics , mathematics , biochemistry , statistics , artificial intelligence , computer science , image (mathematics)

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

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