In situ single-chamber laser processing of YBa sub 2 Cu sub 3 O sub 7 minus. delta. superconducting thin films on yttria-stabilized zirconia buffered (100)GaAs
- Material Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7916 (US)
Superconducting YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}(YBCO) thin films have been deposited {ital in} {ital situ} on GaAs(100) by laser evaporation using yttria-stabilized zirconia (YSZ) as a buffer layer. The YSZ buffer layer was deposited at room temperature initially, followed by a deposition at 650 {degree}C. The YBCO layers were deposited subsequently at substrate temperature of 650 {degree}C. All the depositions were carried out in a single chamber equipped with a multitarget holder using KrF excimer laser, {lambda}=248 nm. The morphology and structure of the buffer layer and YBCO films were determined using x-ray diffraction, scanning electron microscopy, transmission electron microscopy, and Auger spectroscopy. The nature of YSZ films was determined to be polycrystalline with partial texturing. The YBCO superconducting thin films on these YSZ-coated GaAs specimens exhibited strong (00{ital l}) orientation with peak intensities similar to those observed on single-crystal YSZ substrates. The superconducting transition temperature {ital T}{sub {ital c}} (onset) of 92 K and {ital T}{sub {ital c}0}(zero resistance) of 73 K were achieved for YBCO thin films on GaAs with YSZ buffer layers.
- OSTI ID:
- 5663453
- Journal Information:
- Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 59:3; ISSN APPLA; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DEPOSITION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
FILMS
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
HIGH-TC SUPERCONDUCTORS
LASER RADIATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
RADIATIONS
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES