Thin-film YBaCuO superconductors formed by Cu/BaO/Y/sub 2/O/sub 3/ layer structures

Journal Article · Mon Jan 04 04:00:00 EST 1988 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.99328· OSTI ID:5619684

Chang, C; Tsuei, C C; Chi, C C; McGuire, T R

Thin-film superconductors of the YBaCuO family have been formed using layer structures of Cu, BaO, and Y/sub 2/O/sub 3/ deposited on different substrates by electron beam evaporation. Using a thickness ratio of Cu, BaO, and Y/sub 2/O/sub 3/ layers off that of the stoichiometric YBa/sub 2/Cu/sub 3/O/sub 7/ phase, superconducting films were formed on MgO and SrTiO/sub 3/ substrates, with a T/sub c/ for zero resistance exceeding 77 K. The films were found to be composed of the superconducting YBa/sub 2/Cu/sub 3/O/sub 7/ phase and the green Y/sub 2/BaCuO/sub 7/ phase, with the excessive Cu repelled to the surface in an oxidized form. The studies also provide information on the dependence of the superconducting transition on the annealing temperatures and the substrates used.

• Research Organization: IBM T. J. Watson Research Center, Yorktown Heights, New York 10598
• OSTI ID: 5619684
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 52:1; 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
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COATINGS
COPPER
COPPER COMPOUNDS
COPPER OXIDES
DATA
DEPOSITION
DIMENSIONS
ELEMENTS
EXPERIMENTAL DATA
FABRICATION
FILMS
HEAT TREATMENTS
INFORMATION
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
SURFACE COATING
THERMODYNAMIC PROPERTIES
THICKNESS
THIN FILMS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
VAPOR DEPOSITED COATINGS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES