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Microstructure of sputtered superconducting films of Bi sub 2 Sr sub 2 CaCu sub 2 O sub x made by low-temperature, in situ growth

Conference ·
OSTI ID:7009582
; ; ; ; ;
Superconducting films of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub x} have been sputtered onto single crystal MgO substrates using an in situ process at a substrate temperature of {approximately}645{degree}C. These c-axis oriented films exhibit an extrapolated T{sub c0} of 56 K. Electron microscopy reveals that the films are not smoother than films which were post-annealed at 865{degree}C, and that segregation and second-phase precipitation had occurred. It is evident that surface diffusion during in situ processing can enhance segregation in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub x} films. 7 refs., 7 figs.
Research Organization:
Argonne National Lab., IL (USA)
Sponsoring Organization:
DOE/CE; DOE/ER; NSF
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
7009582
Report Number(s):
CONF-900206-8; ON: DE90010067; CNN: STC-8809854
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
656003 -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
FILMS
HEAT TREATMENTS
IN-SITU PROCESSING
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MICROSCOPY
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PROCESSING
SPUTTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUBSTRATES
SUPERCONDUCTING FILMS
TRANSITION ELEMENT COMPOUNDS