Mechanisms controlling the in-situ formation and superconducting properties of Bi-Sr-Ca-Cu-O films

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6411923

Kampwirth, R T; Grace, J M; Miller, D J; McDonald, D B; Gray, K E; Reiten, M; Ascolese, M; Latvakoski, H

We have previously shown that sputtered films of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub x} (BSCCO) deposited onto single crystal MgO substrates held at substrate temperatures, T{sub s}, near 700{degree}C and slowly cooled in oxygen, from High Temperature Superconducting (HTS) films with T{sub czero} between 50 and 70 K. The conditions necessary to achieve superconductivity include having close to stoichiometric composition at the T{sub s} required to form the superconductor. Both T{sub czero} and c-axis orientation increase with T{sub s} while the relative bismuth content decreases. Bismuth film content is affected by the type and amount of oxidant, total system pressure, target-to-substrate spacing, and substrate bias. We suggest oxygen resputtering of the film may play a role similar to the reported for YBa{sub 2}Cu{sub 3}O{sub 7-x} (YBCO). Oxygen partial pressure during and cooldown rate from T{sub s} to {approx}350{degree}C also affects the superconducting properties. 8 refs., 8 figs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/ER; National Science Foundation (NSF)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6411923
• Report Number(s): CONF-900944-34; ON: DE91006559; CNN: STC-8809854(JMG)
• Resource Relation: Conference: Applied superconductivity conference, Aspen, CO (USA), 24-28 Sep 1990
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH OXIDES
SUPERCONDUCTIVITY
CALCIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
DEPOSITION
STRONTIUM OXIDES
MICROSTRUCTURE
SPUTTERING
SUBSTRATES
SUPERCONDUCTING FILMS
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FILMS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360204 - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity