Metalorganic chemical vapor deposition of Bi-Sr-Ca-Cu-O ultrathin films

Journal Article · Thu Aug 01 04:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.349524· OSTI ID:5743130

Sugimoto, T; Yoshida, M; Yuhya, S; Baar, D J; 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)

The metalorganic chemical vapor deposition of Bi-Sr-Ca-Cu-O ultrathin films was performed on single-crystal (100) MgO substrates. An ultrathin film with average thickness of 3.5 nm was found to exhibit the full superconductivity at more than 60 K. The critical current density of a 5-nm-thick film was found to be strongly anisotropic for applied fields parallel and perpendicular to the film plane. In particular, in a field parallel to a film plane, the critical current density was constant up to 6 T even at 50 K, near the critical temperature. From the x-ray-diffraction patterns of ultrathin films prepared at the deposition rates of 3 and 0.3 nm/min, a Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub {ital x}} (2212) phase was found to be formed at the first stage of deposition regardless of the deposition rate, while a Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub {ital x}} (2223) phase was found to be formed in the earlier stage of deposition when the deposition rate was decreased.

• OSTI ID: 5743130
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 70:3; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
DEPOSITION
ELECTRIC CURRENTS
FILMS
HIGH-TC SUPERCONDUCTORS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
SURFACE COATING
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE