Preparation of ultrathin Bi-Sr-Ca-Cu-O superconducting films by metalorganic chemical vapor deposition

Journal Article · Mon Mar 11 04:00:00 EST 1991 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.104385· OSTI ID:6259250

Sugimoto, T; Yoshida, M; Sugawara, K; Shiohara, Y; Tanaka, S ^[1]

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1. Superconductivity Research Laboratory, ISTEC, 10-13 Shinonome 1-chome Koto-ku, Tokyo 135, Japan (JP)

Ultrathin Bi-Sr-Ca-Cu-O films close to a single unit cell ({ital c}=3.1 nm for Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub {ital x}} (2212) phase) were grown on a (100)MgO substrate by metalorganic chemical vapor deposition. The ultrathin film, having an average thickness of 3.5 nm, exhibited a zero-resistance superconducting transition, {ital T}{sub {ital c},0}=64 K, comparable with the {ital T}{sub {ital c},0} of much thicker films, whereas the superconducting property of thinner films than 3.5 nm was drastically deteriorated. The x-ray diffraction (XRD) measurement of the ultrathin films showed that the reflection peaks from 00{ital l} contributed to a 2212 phase were observed even in the 2.2-nm-thick film, and that its {ital c}-axis lattice constant was consistent with that of a bulk 2212 phase. On the other hand, the thicker films than 5.5 nm mainly consisted of the Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub {ital x}} (2223) phase with a trace amount of the 2212 phase from the XRD patterns.

• OSTI ID: 6259250
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 58:10; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
DEPOSITION
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
FILMS
HIGH-TC SUPERCONDUCTORS
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCANNING ELECTRON MICROSCOPY
SCATTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
SURFACE COATING
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION