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Imprinted labyrinths and percolation in Nd-Co/Nb magnetic/superconducting hybrids

AuthorsRuiz-Valdepeñas, L.; Vélez, María ; Valdés-Bango, F. ; Álvarez-Prado, L. M. ; García Alonso, F. J. ; Martín, José Ignacio ; Navarro, E. ; Alameda, J. M. ; Vicent, J. L.
Issue Date2014
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 115(21): 213901 (2014)
AbstractMagnetization reversal processes have been studied in hybrid magnetic/superconducting Nd-Co/Nb bilayers by the comparison of out-of-plane magnetic hysteresis loops and superconducting phase diagrams as a function of magnetic layer thickness and of disorder in the magnetic layer induced by a nanostructured copolymer template. A good correlation is found between the regimes corresponding to percolation effects in the superconductor and to the transition from extended to confined superconductivity with the characteristic fields for reverse domain nucleation and fast domain expansion in the magnetic layer, indicating that superconductivity nucleates on the disordered network imprinted on the superconducting layer by the labyrinth domain structure of the magnetic layer. As disorder increases in the magnetic layer, percolation effects disappear from the superconducting transitions in agreement with a more homogeneous magnetization reversal process. © 2014 AIP Publishing LLC.
Identifiersdoi: 10.1063/1.4881277
issn: 0021-8979
e-issn: 1089-7550
Appears in Collections:(CINN) Artículos
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