In situ epitaxial growth of Bi sub 2 (Sr,Ca) sub 3 Cu sub 2 O sub x films by ion beam sputtering with an atomic oxygen source

Journal Article · Mon Jan 15 04:00:00 EST 1990 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.103286· OSTI ID:6986401

Fujita, J; Yoshitake, T; Igarashi, H ^[1]; Satoh, T ^[2]

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1. Fundamental Research Laboratory, NEC Corporation, 4-1-1 Miyazaki, Miyamae-ku, Kawasaki 213, Japan (JP)
2. Resources and Environment Protection Research Laboratory, NEC Corporation, 4-1-1 Miyazaki, Miyamae-ku, Kawasaki 213, (JP)

{ital In} {ital situ} epitaxial growth of Bi{sub 2}(Sr,Ca){sub 3}Cu{sub 2}O{sub {ital x}} films was performed by ion beam sputtering in atomic oxygen ambience at the substrate temperature of 640 {degree}C. The films showed an epitaxial growth in which the {ital a} and {ital b} axes were parallel to {l angle}100{r angle} MgO, and the superstructure according to the incommensurate modulation along the {ital b} axis was also observed. The superconducting properties of the as-grown films seemed to sensitively depend on the oxidation treatment during the cooling down process. The zero resistivity temperature {ital T}{sub {ital c}}({ital R}=0) of a 600-A-thick film cooled down in the same atomic oxygen density as the film growth ambience was 60 K, but it increased up to 80 K after a post-deposition annealing at 500 {degree}C for 1 h in air. In contrast, as-grown films cooled down in insufficient oxidation ambience showed the {ital T}{sub {ital c}}({ital R}=0) of 76 K without post-deposition annealing. The control of the oxygen concentration is critical for the superconductivity of as-grown films.

• OSTI ID: 6986401
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 56:3; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
656003 -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COLLISIONS
COPPER COMPOUNDS
COPPER OXIDES
DATA
DIMENSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EPITAXY
EXPERIMENTAL DATA
FABRICATION
FILMS
HEAT TREATMENTS
HIGH TEMPERATURE
INFORMATION
ION COLLISIONS
LOW TEMPERATURE
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SPUTTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
THICKNESS
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VERY LOW TEMPERATURE