Josephson-coupled systems in perpendicular magnetic fields

Journal Article · Sat May 01 04:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.11291· OSTI ID:6642034

Daemen, L L; Bulaevskii, L N; Maley, M P; Coulter, J Y ^[1]

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1. Theoretical Division and Superconductivity Technology Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

We calculate the critical current along the [ital c] axis of a stack of Josephson-coupled layers when the applied magnetic field is perpendicular to the junctions plane. The anisotropy parameter and the Josephson interlayer critical current in the Lawrence-Doniach model are renormalized by the vortex fluctuations and have to be determined self-consistently. This leads to the existence of a decoupling phase transition in the ([ital H],[ital T]) plane. The decoupling phase transition is first order for moderate (bare) anisotropies and second order for large anisotropies. We consider the effect of pinning centers and show that only strong disorder affects the critical current. Application of the formalism to single crystals, tapes, and films of highly anisotropic, layered superconductors is discussed. The magnetic field and temperature dependence of the critical current in tapes is calculated for the brick-wall model.

• OSTI ID: 6642034
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:17; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
CRITICAL CURRENT
CRYSTALS
CURRENTS
ELECTRIC CURRENTS
FILMS
JOSEPHSON JUNCTIONS
JUNCTIONS
MAGNETIC FIELDS
MATHEMATICS
MONOCRYSTALS
NUMERICAL ANALYSIS
PHASE TRANSFORMATIONS
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
TEMPERATURE EFFECTS