Normal-metal--insulator--superconductor tunnel-junction study of the magnetic field dependence of superconducting thin films

Journal Article · Sat Oct 01 00:00:00 EDT 1977 · Phys. Rev., B; (United States)

DOI:https://doi.org/10.1103/PhysRevB.16.3165· OSTI ID:7084424

Gusman, G; Thomas, J F; Deltour, R

Measurements of the orientational and field dependence of normal-metal--insulator--superconductor tunnel junctions have been carried out on superposed Al-Al/sub 2/O/sub 3/-Pb thin films. The experimental results are the subject of a theoretical discussion based on a variational solution of the Ginzburg-Landau free-energy expression for a superconducting film in the presence of an applied magnetic field of arbitrary intensity, whose orientation with respect to the surface of the film makes an angle theta. We derive a general expression for the tunnel characteristics which, near the transition, is in agreement with Tinkham's formula for the upper critical field H/sub c/(theta).

• Research Organization: Physique des Solides, Campus de la Plaine CP 233, Universite Libre de Bruxelles, 1050-Brussels, Belgium
• OSTI ID: 7084424
• Journal Information: Phys. Rev., B; (United States), Vol. 16:7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
MAGNETIC FIELDS
ALUMINIUM OXIDES
LEAD
SUPERCONDUCTING JUNCTIONS
GINZBURG-LANDAU THEORY
SUPERCONDUCTING FILMS
VARIATIONAL METHODS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
ELEMENTS
FILMS
METALS
OXIDES
OXYGEN COMPOUNDS
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