YBa sub 2 CU sub 3 O sub 7 /PrBa sub 2 Cu sub 3 O sub 7 superlattices: Properties of Ultrathin superconducting layers separated by insulating layers

Journal Article · Mon Feb 12 00:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.804· OSTI ID:7158699

Triscone, J; Fischer, O; Brunner, O; Antognazza, L; Kent, A D ^[1]; Karkut, M G ^[2]

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1. Departement de Physique de la Matiere Condensee, Universite de Geneve, 24 quai Ernest Ansermet, CH-1211 Geneve 4, (Switzerland)
2. Laboratoire de Chimie Minerale B, Universite de Rennes I, avenue du General-Leclerc, 35042 Rennes CEDEX, (France)

We have artificially varied the coupling between ultrathin YBa{sub 2}Cu{sub 3}O{sub 7} layers by interposing insulating planes of PrBa{sub 2}Cu{sub 3}O{sub 7} in multilayers and studied the consequences of decoupling 12-A YBa{sub 2}Cu{sub 3}O{sub 7} unit cells on the superconducting properties. We find that the {ital T}{sub {ital c}} (midpoint) of a 12-A/12-A multilayer is 55 K, twice that of the corresponding alloy. {ital T}{sub {ital c}} decreases linearly with further separation of the YBa{sub 2}Cu{sub 3}O{sub 7} unit cells, the transition width increases and shows evidence of 2D fluctuations, and the influence of a magnetic field parallel to the layers is markedly reduced.

• OSTI ID: 7158699
• Journal Information: Physical Review Letters; (USA), Vol. 64:7; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COUPLING
COPPER OXIDES
PRASEODYMIUM OXIDES
SUPERCONDUCTING FILMS
SUPERLATTICES
YTTRIUM OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL INSULATORS
LOW TEMPERATURE
SYNTHESIS
THICKNESS
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
VARIATIONS
VERY LOW TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
DIMENSIONS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
EQUIPMENT
FILMS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
RARE EARTH COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360204 - Ceramics
Cermets
& Refractories- Physical Properties