Metalorganic chemical vapor deposition of Tl sub 2 CaBa sub 2 Cu sub 2 O sub y superconducting thin films on sapphire

Journal Article · Mon Sep 18 04:00:00 EDT 1989 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.101892· OSTI ID:5525343

Zhang, K; Boyd, E P; Kwak, B S; Wright, A C; Erbil, A ^[1]

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1. School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332 (US)

Superconducting Tl{sub 2}CaBa{sub 2}Cu{sub 2}O{sub {ital y}} thin films have been successfully grown on the single-crystal sapphire (1{bar 1}02) substrate by using the metalorganic chemical vapor deposition technique. The growth rate of the films was about 5 {mu}m/h. The as-deposited film was post-annealed in a partially sealed ceramic crucible in the presence of a Tl{sub 2}Ca{sub 2}Ba{sub 2}Cu{sub 3}O{sub {ital y}} pellet to achieve the superconducting phase. The x-ray data show strong diffraction from the Tl{sub 2}CaBa{sub 2}Cu{sub 2}O{sub {ital y}} superconducting phase in addition to the trace amounts of Ca{sub 2}CuO{sub 3} and BaCO{sub 3}. Superconducting transition temperatures with onset above 100 K and zero resistance at 94 K can be obtained by further heat treatment at 500 {degree}C in oxygen.

• OSTI ID: 5525343
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 55:12; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CORUNDUM
DEPOSITION
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FABRICATION
FILMS
HEAT TREATMENTS
LOW TEMPERATURE
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
SAPPHIRE
SCATTERING
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SURFACE COATING
THALLIUM COMPOUNDS
THALLIUM OXIDES
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION