Avalanche-driven fractal flux distributions in NbN superconducting films

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dc.creatorRudnev, I. A.
dc.creatorShantsev, D. V.
dc.creatorJohansen, T. H.
dc.creatorPrimenko, A. E.
dc.date2004-11-18
dc.date.accessioned2026-07-07T03:02:13Z
dc.date.available2026-07-07T03:02:13Z
dc.descriptionFlux distributions in thin superconducting NbN films placed in a perpendicular magnetic field have been studied using magneto-optical imaging. Below 5.5 K the flux penetrates in the form of abrupt avalanches resulting in dendritic structures. Magnetization curves in this regime exhibit extremely noisy behavior. Stability is restored both above a threshold temperature T* and applied field H*, where H* is smaller for increasing field than during descent. The dendrite size and morphology are strongly T dependent, and fractal analysis of the first dendrites entering into a virgin film shows that dendrites formed at higher T have larger fractal dimension.
dc.description3 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0411489
dc.identifierhttp://arxiv.org/abs/cond-mat/0411489
dc.identifierAppl. Phys. Lett. 87, 042502 (2005)
dc.identifierdoi:10.1063/1.1992673
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25314
dc.subjectSuperconductivity
dc.titleAvalanche-driven fractal flux distributions in NbN superconducting films
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