Preparation of a high- J sub c Y-Ba-Cu-O film at 700 degree C by thermal chemical vapor deposition

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

DOI:https://doi.org/10.1063/1.347491· OSTI ID:5691710

Yamane, H; Hirai, T; Watanabe, K; Kobayashi, N; Muto, Y ^[1]; Hasei, M; Kurosawa, H ^[2]

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1. Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980, Japan (JP)
2. Riken Co., 810 Kumagaya, Kumagaya 360, Japan (JP)

A high-{ital J}{sub {ital c}} Y-Ba-Cu-O superconducting film was successfully prepared at 700 {degree}C on a SrTiO{sub 3}(100) single-crystal substrate without postannealing by thermal chemical vapor deposition under a low-oxygen partial pressure of 0.036 Torr in the total gas introduced into a hot-wall-type reactor (total gas pressure: 10 Torr), using 1% O{sub 2} balanced with Ar as a reactant gas. The sources for the elements of Ba, Y, and Cu were {beta}-diketone metal chelates. The film mainly consisted of YBa{sub 2}Cu{sub 3}O{sub {ital x}} with {ital c}-axis orientation perpendicular to the substrate plane and included small amounts of {ital a}-axis oriented and randomly oriented grains. The film showed the superconducting transition temperature defined by zero resistivity at 89 K. The critical current density based on a 2 {mu}V/cm criterion was 2.2 {times} 10{sup 6} A/cm{sup 2} at 77.3 K and 0 T.

• OSTI ID: 5691710
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:11; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
DEPOSITION
ELECTRIC CURRENTS
FILMS
HIGH TEMPERATURE
HIGH-TC SUPERCONDUCTORS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
SURFACE COATING
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES