YBa sub 2 Cu sub 3 O sub x -microstructures on semiconductor substrates

Conference · Fri Mar 01 00:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5766176

Schilling, M; Merkt, U ^[1]

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1. Hamburg Univ. (Germany). Inst. fuer Angewandte Physik

Thin films of YBa{sub 2}Cu{sub 3}O{sub x} are prepared by laser ablation with a KrF excimer laser on Si and GaAs. These films show degraded superconducting properties compared to our films on SrTiO{sub 3} which exhibit critical temperatures T{sub co} = 89 K and critical current densities j{sub c}(77 K) in the 10{sup 6} A/cm{sup 2} range. Critical temperatures of 57 K and 30 K for films on Si and GaAs, respectively, could be achieved. On SrTiO{sub 3} the authors prepare YBa{sub 2}Cu{sub 3}O{sub x} microbridges with widths down to 10 {mu}m by wet chemical etching or by laser ablation through metal masks. Patterning of films on bare Si however, is complicated by microcracks in the film due to different lattice constants and thermal expansion coefficients of Si and YBa{sub 2}Cu{sub 3}O{sub x}. These problems may be overcome by the use of buffer layers whose influence on the film quality is also studied in this paper.

• OSTI ID: 5766176
• Report Number(s): CONF-900944-; CODEN: IEMGA
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:2; Conference: 1990 applied superconductivity conference, Snowmass, CO (United States), 24-28 Sep 1990; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
ABLATION
SUPERCONDUCTIVITY
COPPER OXIDES
YTTRIUM OXIDES
BUFFERS
CRITICAL CURRENT
CURRENT DENSITY
EXCIMER LASERS
GALLIUM ARSENIDES
KRYPTON FLUORIDE LASERS
MICROSTRUCTURE
SEMICONDUCTOR MATERIALS
SILICON
STRONTIUM OXIDES
SUBSTRATES
THIN FILMS
TITANIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL STRUCTURE
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELEMENTS
FILMS
GALLIUM COMPOUNDS
GAS LASERS
LASERS
MATERIALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
SEMIMETALS
STRONTIUM COMPOUNDS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)