Superconducting Bi-Sr-Ca-Cu-O films formed by diffusion of metallic bismuth on Sr sub 2 Ca sub 2 Cu sub 4 O sub y substrates

Journal Article · Mon Mar 11 00:00:00 EST 1991 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.104384· OSTI ID:6226964

Lee, K; Park, G ^[1]

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1. Department of Physics, Sogang University, C.P.O. Box 1142, Seoul, Korea (KR)

The superconducting low {ital T}{sub {ital c}} Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub {ital y}} films of 1 {mu}m in thickness have been prepared on Sr{sub 2}Ca{sub 2}Cu{sub 4}O{sub {ital y}} substrates by thermal evaporation of metallic Bi layer and heat treatment at 830 {degree} C for a few minutes in air. The transition behavior and morphology of the films were studied by resistivity measurements and scanning electron microscopy. The zero resistance temperature {ital T}{sub {ital cz}} and critical current density {ital J}{sub {ital c}} at 70 K were observed to be 78 K and 10{sup 3} A/cm{sup 2}, respectively. It is found that the superconducting films are formed by the reaction between liquid phase (Bi{sub 2}O{sub 3}) and solid phase (substrate), and that the dendrite structure is produced in the cross section of the films as it is generally observed in the liquid phase sintering.

• OSTI ID: 6226964
• Journal Information: Applied Physics Letters; (USA), Vol. 58:10; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
SUPERCONDUCTIVITY
VACUUM EVAPORATION
CALCIUM OXIDES
COPPER OXIDES
STRONTIUM OXIDES
ATOM TRANSPORT
CRITICAL CURRENT
HIGH-TC SUPERCONDUCTORS
SINTERING
SUPERCONDUCTING FILMS
TRANSITION TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
EVAPORATION
FABRICATION
FILMS
NEUTRAL-PARTICLE TRANSPORT
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RADIATION TRANSPORT
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360204 - Ceramics
Cermets
& Refractories- Physical Properties