Properties of in-situ superconducting thin films of Y-Ba-Cu-O on Si, Al/sub 2/O/sub 3/, and SrTiO/sub 3/ substrates

Conference · Wed Mar 01 04:00:00 EST 1989 · IEEE Trans. Magn.; (United States)

OSTI ID:5917918

Silver, R M; Berezin, A B; Ogawa, E; DeLozanne, A L

The authors report on the as-deposited superconducting properties and microstructure of YBa/sub 2/Cu/sub 3/O/sub 7-y/ thin films grown on Si, Al/sub 2/O/sub 3/, and SrTiO/sub 3/ (110) and (100). They have deposited thin films of YBa/sub 2/Cu/sub 3/O/sub 7-y/ directly on Si which have critical temperatures as high as 68K. They have also grown in-situ superconducting films on SrTiO/sub 3/ (110) with critical temperatures at 84.5K and critical currents typically around 1x10/sup 6/ A/cm/sup 2/ at 4.2K. Transmission electron microscopy and x-ray diffraction studies show that the films on SrTiO/sub 3/ (110) have a single orientation and no grain boundaries. This paper describes thin films 300 nm thick deposited directly on silicon (100) and (111), sapphire (1102), and strontium titanate (110) and (100) substrates. During deposition the substrate is heated to between 540 and 600/sup 0/C and submersed in an oxygen plasma. After deposition the sample is soaked for 20 minutes in the oxygen plasma and then cooled to room temperature in an atmosphere of oxygen.

• Research Organization: 6209000
• OSTI ID: 5917918
• Report Number(s): CONF-880812-
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: 25:2
• 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
420201* -- Engineering-- Cryogenic Equipment & Devices
656003 -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRITICAL TEMPERATURE
CRYSTAL STRUCTURE
CURRENTS
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
ELEMENTS
EVAPORATION
FABRICATION
FILMS
GRAIN ORIENTATION
MICROSCOPY
MICROSTRUCTURE
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SCATTERING
SEMIMETALS
SILICON
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUBSTRATES
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES