YBa sub 2 Cu sub 3 O sub 7 minus. delta. /Au/Nb sandwich geometry SNS weak links on c-axis oriented YBa sub 2 Cu sub 3 O sub 7 minus. delta

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

OSTI ID:5845686

Foote, M C; Hunt, B D; Bajuk, L J ^[1]

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1. Center for Space Microelectronics Technology, Jet Propulsion Lab., California Inst. of Technology, Pasadena, CA (US)

This paper reports on sandwich geometry superconductor/normal metal/superconductor structures which have been fabricated on LaAlO{sub 3} and cubic zirconia with laser ablated, c-axis oriented YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} base electrodes, 100-600 {Angstrom} of Au, and Nb counter electrodes, all formed in-situ without breaking vacuum. Junctions ranged in size from 5 to 20 {mu}m on a side. Four probe I-V measurements at 4.2 K show R{sub n}A products as low as 6 {times} 10{sup {minus}9} {Omega} cm{sup 2} and critical current densities up to 5.2 kA/cm{sup 2}. AC Josephson steps were observed with the application of 10 GHz radiation. The best results were obtained when the devices were annealed at {approximately}450{degrees} C in O{sub 2} for 30 minutes after Au deposition.

• OSTI ID: 5845686
• 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
LANTHANUM OXIDES
CRYSTAL STRUCTURE
ZIRCONIUM OXIDES
ABLATION
ALUMINIUM COMPOUNDS
ANNEALING
CRITICAL CURRENT
CURRENT DENSITY
DEPOSITION
ELECTRODES
GOLD
GRAIN ORIENTATION
LASERS
LAYERS
NIOBIUM
RADIATION EFFECTS
SUPERCONDUCTING JUNCTIONS
YTTRIUM OXIDES
CHALCOGENIDES
CURRENTS
ELECTRIC CURRENTS
ELEMENTS
HEAT TREATMENTS
JUNCTIONS
LANTHANUM COMPOUNDS
METALS
MICROSTRUCTURE
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies