0372-400Х (Edition in Ukrainian)
2071-0186 (Edition in English)
2071-0194 (in electronic form)
Abbreviated key title: Ukr. J. Phys.
Current issue Ukr. J. Phys. 2014, Vol. 58, N 6, p.596-603
Pylypovskyi O.V.1, Sheka D.D.1, Kravchuk V.P.2, Gaididei Yu.B.2, Mertens F.G.3
1 Taras Shevchenko National University of Kyiv
(60, Volodymyrs’ka Str., 01601 Kyiv, Ukraine; e-mail: email@example.com)
2 Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine
(14b, Metrolohichna Str., Kyiv, 03680, Ukraine)
3 Physics Institute, University of Bayreuth
(95440 Bayreuth, Germany)
Mechanism of Fast Axially Symmetric Reversal of Magnetic Vortex Core
Original Author's Text: English
Abstract: The magnetic vortex core in a nanodot can be switched by an alternating transversal magnetic field. We propose a simple collective coordinate model, which describes the comprehensive vortex core dynamics, including the resonant behavior, weakly nonlinear regimes, and reversal dynamics. A chaotic dynamics of the vortex polarity is predicted. All analytical results are confirmed by micromagnetic simulations.
Key words: magnetic vortex, nanodot, nanodisk, vortex random-access memories.