Superconducting YBa{sub 2}Cu{sub 3}O{sub 7} bolometer on polycrystalline diamond
- Excel Superconductor, Inc., Bohemia, NY (United States)
The authors have deposited superconducting YBCO (YBa{sub 2}Cu{sub 3}O{sub 7}) thin films on polycrystalline diamond using a composite Si/YSZ (yttria stabilized zirconia) diffusion barrier. 10--20 micron thick, free standing diamond films were coated with a micron thick layer of amorphous Si by plasma CVD. This was vacuum annealed at 700 C to crystallize Si prior to the in-situ deposition of YSZ and YBCO by laser ablation. A primary layer of Si was found essential to avoid the peeling of the multilayer structure during the cooling of the substrates. A T{sub c{minus}zero} = 50K was observed for the best films. A bolometer fabricated from this film exhibited a 18V/W responsivity and NEP = 6.3 {times} 10{sup {minus}9}W/{radical}Hz at 60K. Both the buffer layers and YBCO were polycrystalline. They believe single crystal Si backing CVD grown diamond can be used instead of a polycrystalline Si layer to further improve the quality of the YBCO deposited on polycrystalline diamond.
- OSTI ID:
- 86176
- Report Number(s):
- CONF-940142--; ISBN 0-8194-1454-9
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
INCLUDING NUCLEAR AND PARTICLE DETECTORS
BARIUM OXIDES
BOLOMETERS
CHEMICAL VAPOR DEPOSITION
COPPER OXIDES
EXPERIMENTAL DATA
FABRICATION
HIGH-TC SUPERCONDUCTORS
INFRARED RADIATION
MATERIALS
RADIATION DETECTION
SILICON
SUBSTRATES
SUPERCONDUCTING FILMS
TRANSITION TEMPERATURE
YTTRIUM OXIDES
ZIRCONIUM OXIDES