Double percolation effects and fractal behavior in magnetic/superconducting hybrids



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Ruiz Valdepenas, L. and Vélez, M. and Valdés Bango, F. and Álvarez Prado, L.M. and Martin, J. I. and Navarro Palma, Elena and Alameda, J.M. and 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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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.

Uncontrolled Keywords:Superconducting properties; Temperature-dependence; Mixed-state; Thin-films; Dimensionality; Anisotropy; Exponents; Networks
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:44897
Deposited On:02 Nov 2017 12:34
Last Modified:02 Nov 2017 15:57

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