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Double percolation effects and fractal behavior in magnetic/superconducting hybrids



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Ruiz Valdepenas, L. y Vélez, M. y Valdés Bango, F. y Álvarez Prado, L.M. y Martin, J. I. y Navarro Palma, Elena y Alameda, J.M. y Vicent López, José Luis (2013) Double percolation effects and fractal behavior in magnetic/superconducting hybrids. New journal of physics, 15 . ISSN 1367-2630

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URL Oficial: http://dx.doi.org/10.1088/1367-2630/15/10/103025

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Perpendicular magnetic anisotropy ferromagnetic/superconducting (FM/SC) bilayers with a labyrinth domain structure are used to study nucleation of superconductivity on a fractal network, tunable through magnetic history. As clusters of reversed domains appear in the FM layer, the SC film shows a percolative behavior that depends on two independent processes: the arrangement of initial reversed domains and the fractal geometry of expanding clusters. For a full labyrinth structure, the behavior of the upper critical field is typical of confined superconductivity on a fractal network.

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© IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Work supported by Spanish MINECO under grant numbers FIS2008-06249, Consolider CDS2007-00010 and CAM grant number S2009/MAT-1726. LRV acknowledges support from a FPU fellowship.

Palabras clave:Superconducting properties; Temperature-dependence; Mixed-state; Thin-films; Dimensionality; Anisotropy; Exponents; Networks
Materias:Ciencias > Física > Física de materiales
Ciencias > Física > Física del estado sólido
Código ID:44897
Depositado:02 Nov 2017 12:34
Última Modificación:02 Nov 2017 15:57

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