Effects of silver and gold on the YBaCuO superconducting thin films with the use of Ag/Cu/BaO/Y/sub 2/O/sub 3/ and Au/Cu/BaO/Y/sub 2/O/sub 3/ structures

Journal Article · Mon Mar 14 04:00:00 EST 1988 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.99275· OSTI ID:5484708

Chang, C

Superconducting YBaCuO films have been fabricated from the Ag/Cu/BaO/Y/sub 2/O/sub 3/ and Au/Cu/BaO/Y/sub 2/O/sub 3/ layer structures on MgO substrates. Compared to those using only the Cu/BaO/Y/sub 2/O/sub 3/ structure, the addition of a silver layer to the starting structures improves the film resistances, especially at reduced annealing temperatures, allowing the study of the dependence of the superconducting transition on the annealing temperatures between 900 and 750 /sup 0/C. Zero resistance is observed at 80 K for the Ag/Cu/BaO/Y/sub 2/O/sub 3/ structure annealed at 900 /sup 0/C. The use of a gold layer, on the other hand, reduces the temperature for zero resistance to 75 K for a similarly annealed film. All the superconducting films are composed of the YBa/sub 2/Cu/sub 3/O/sub 7/ and the Y/sub 2/BaCuO/sub 7/ phases, with starting compositions off that of the former. Structural and morphological analysis of the films is performed to explore the roles of silver and gold in the films formed.

• Research Organization: IBM T. J. Watson Research Center, Yorktown Heights, New York 10598
• OSTI ID: 5484708
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 52:11; 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
COPPER
COPPER COMPOUNDS
COPPER OXIDES
DATA
ELEMENTS
EXPERIMENTAL DATA
FABRICATION
FILMS
GOLD
HEAT TREATMENTS
INFORMATION
LAYERS
LOW TEMPERATURE
METALS
MORPHOLOGY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SILVER
SUPERCONDUCTING FILMS
THERMODYNAMIC PROPERTIES
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
VERY HIGH TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES