Organometallic chemical vapor deposition routes to high T/sub c/ superconducting Tl-Ba-Ca-Cu-O films

Journal Article · Mon May 22 04:00:00 EDT 1989 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.101515· OSTI ID:6337325

Richeson, D S; Tonge, L M; Zhao, J; Zhang, J; Marcy, H O; Marks, T J; Wessels, B W; Kannewurf, C R

Films of the Tl-Ba-Ca-Cu-O high T/sub c/ superconductor can be prepared by either of two organometallic chemical vapor deposition routes. Ba-Ca-Cu-O films are first prepared on yttria-stabilized zirconia using the volatile precursors Ba(heptafluorodimethyloctanedionate)/sub 2,/ Ca(dipivaloylmethanate)2, and Cu(acetylacetonate)/sub 2./ Deposition is carried out at 5 Torr pressure with argon as the carrier gas and water vapor as the reactant gas. Thallium is next incorporated in these films either by vapor diffusion using bulk Tl-Ba-Ca-Cu-O as the source, or by organometallic chemical vapor deposition using Tl(cyclopentadienide) as the source. The latter deposition is carried out at atmospheric pressure with an argon carrier and water-saturated oxygen reactant, followed by rapid thermal annealing. Both types of films consist primarily of the TlBa/sub 2/Ca/sub 2/Cu/sub 3/O/sub x/ phase, have preferential orientation of the CuO planes parallel to the substrate surface, and exhibit onset of superconductivity at /similar to/120 K with zero resistance by 100 K.

• Research Organization: Northwestern University, Evanston, Illinois 60208
• OSTI ID: 6337325
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 54:21; ISSN APPLA
• 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
ARGON
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
COATINGS
COPPER COMPOUNDS
COPPER OXIDES
DATA
DEPOSITION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
LOW PRESSURE
LOW TEMPERATURE
METALS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE GASES
SUPERCONDUCTIVITY
SURFACE COATING
THALLIUM
THALLIUM COMPOUNDS
THALLIUM OXIDES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VAPOR DEPOSITED COATINGS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES