Dimensional crossover in superlattice superconductors

Journal Article · Tue May 01 04:00:00 EDT 1984 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.29.4915· OSTI ID:6694686

Chun, C S.L.; Zheng, G; Vicent, J L; Schuller, I K

We have observed dimensional crossover from anisotropic three-dimensional behavior to two-dimensional behavior in both the temperature dependence and the angular dependence of the upper critical fields of Nb/Cu superlattice superconductors. The crossover occurs when the coherence length xi/sub perpendicular/ perpendicular to the layer planes is of the order of the copper layer thickness D/sub Cu/. We have observed the crossover (1) by varying the temperature, thereby varying xi/sub perpendicular/ relative to D/sub Cu/ and (2) by varying D/sub Cu/ relative to xi/sub perpendicular/. The complicating effects due to surface superconductivity have been eliminated by placing thick copper films as the outside layers of the samples. The measurements are in qualitative agreement with theoretical models of layered superconductors.

• Research Organization: Materials Science and Technology Division, Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 6694686
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 29:9; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR CORRELATION
CLATHRATES
COPPER COMPOUNDS
CORRELATIONS
CRITICAL FIELD
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
INFORMATION
MAGNETIC FIELDS
NIOBIUM COMPOUNDS
NUMERICAL DATA
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
SUPERLATTICES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS