Universal criterion and phase diagram for switching a magnetic vortex core in soft magnetic nanodots

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dc.creatorLee, Ki-Suk
dc.creatorKim, Sang-Koog
dc.creatorYu, Young-Sang
dc.creatorChoi, Youn-Seok
dc.creatorGuslienko, Konstantin Yu.
dc.creatorJung, Hyunsung
dc.creatorFischer, Peter
dc.date2008-07-11
dc.date2008-12-01
dc.date.accessioned2026-07-07T12:23:30Z
dc.date.available2026-07-07T12:23:30Z
dc.descriptionThe universal criterion for ultrafast vortex-core switching between the up- and down-core bistates in soft magnetic nanodots was investigated by micromagnetic simulations along with analytical calculations. Vortex-core switching occurs whenever the velocity of vortex-core motion reaches the critical velocity that is expressed as (e.g. m/s for Permalloy), where Aex is the exchange stiffness, and is the gyromagnetic ratio. On the basis of the above results, phase diagrams for the vortex-core switching event and switching times with respect to both the amplitude and frequency of applied circularly rotating magnetic field were calculated, which offer practical guidance for implementing nanodots in vortex states into future solid-state information-storage devices.
dc.description25 pages, 5 figures. To whom all correspondence should be addressed: sangkoog@snu.ac.kr
dc.identifierhttps://arxiv.org/abs/0807.1848
dc.identifierhttp://arxiv.org/abs/0807.1848
dc.identifierPhys. Rev. Lett. 101, 267206 (2008)
dc.identifierdoi:10.1103/PhysRevLett.101.267206
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/214009
dc.subjectMaterials Science
dc.titleUniversal criterion and phase diagram for switching a magnetic vortex core in soft magnetic nanodots
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