As-deposited superconducting Y-Ba-Cu-O thin films on Si, Al/sub 2/O/sub 3/, and SrTiO/sub 3/ substrates

Journal Article · Mon Jun 20 04:00:00 EDT 1988 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.99760· OSTI ID:5221610

Silver, R M; Berezin, A B; Wendman, M; de Lozanne, A L

We have developed an electron beam evaporator designed to deal with the special requirements of thin films of oxide superconductors. The growing surface is sprayed with plasma-excited oxygen while the sources and rate monitors operate in a low background pressure. This allows us to reproducibly grow films of Y-Ba-Cu-O on Si, Al/sub 2/O/sub 3/, and SrTiO/sub 3/ substrates at a substrate temperature of 540 /sup 0/C which are superconducting without the need for annealing. The resistive transitions of most films show an onset of 90 K and zero resistance by 68 K. X-ray diffraction indicates a preferred orientation for growth on most Si and SrTiO/sub 3/ substrates. A preliminary measurement yields critical currents of at least 10/sup 4/ A/cm/sup 2/ at 4.2 K for a film on silicon.

• Research Organization: Department of Physics, University of Texas, Austin, Texas 78712-1081
• OSTI ID: 5221610
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 52:25; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COATINGS
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
DATA
DEPOSITION
DIFFRACTION
ELECTRIC CURRENTS
ELEMENTS
EXPERIMENTAL DATA
FABRICATION
FILMS
HEAT TREATMENTS
HIGH TEMPERATURE
INFORMATION
LOW TEMPERATURE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCATTERING
SEMIMETALS
SILICON
SPRAY COATING
SPRAYED COATINGS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
SURFACE COATING
THERMODYNAMIC PROPERTIES
THIN FILMS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES