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Perpendicular upper critical field of a proximity-coupled superconducting film

Sidorenko, Anatoli S. 1; Sürgers, Christoph 1; Löhneysen, Hilbert von 1
1 Physikalisches Institut (PHI), Karlsruher Institut für Technologie (KIT)


The temperature dependence of the perpendicular upper critical field Bc2⊥ of a single superconducting Nb film (S) sandwiched between insulating (I) and/or normal-metal layers (N=Cu) is investigated. For the ISI configuration, Bc2⊥ exhibits the usual linear T-dependence near the transition temperature Tc in contrast to the NSI and NSN configurations where a positive curvature of Bc2⊥(T) is observed near Tc. This demonstrates the influence of the different boundary conditions on the Bc2⊥(T) behavior of a single S film in contact with N or I. Deviations from the linear T-dependence are thus attributed to the proximity effect due to the presence of an N–S boundary.

DOI: 10.1016/S0921-4534(01)00929-7
Zitationen: 10
Web of Science
Zitationen: 10
Zitationen: 10
Zugehörige Institution(en) am KIT Institut für Festkörperphysik (IFP)
Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2002
Sprache Englisch
Identifikator ISSN: 0921-4534, 1873-2143
KITopen-ID: 20892002
HGF-Programm 45.01.01 (Vor POF, LK 01)
Erschienen in Physica / C
Verlag North-Holland Publishing
Band 370
Heft 3
Seiten 197-204
Schlagwörter Perpendicular critical field, Proximity effect, Superconducting films
Nachgewiesen in Dimensions
Web of Science
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