Stochastic dynamics of strongly-bound magnetic vortex pairs

• 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.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

Intelligent systems

Monte Carlo methods

Stochastic systems

Collective magnetization

Dipolar interaction

External fields

Magnetic state

Magnetic vortices

Random switching

Stochastic dynamics

Vortex pair

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