dc SQUID made of Ag-doped YBa sub 2 Cu sub 3 O sub 7 a - b plane-edge junctions

Journal Article · Mon Dec 30 04:00:00 EST 1991 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.105603· OSTI ID:6093936

Koren, G; Cohen, D; Polturak, E; Aharoni, E ^[1]

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1. Physics Department and the Crown Center for Superconductivity, Technion-Israel Institute of Technology, Haifa, 32000 (Israel)

Preparation and characterization of dc SQUIDs based on YBa{sub 2}Cu{sub 3}O{sub 7}/Ag/YBa{sub 2}Cu{sub 3}O{sub 7} edge junctions is reported. The SQUIDs were prepared {ital in} {ital situ} by a multistep {ital all} laser ablation deposition process. Since the Ag on YBa{sub 2}Cu{sub 3}O{sub 7} was exposed to 730 {degree}C in O{sub 2} ambient, the barrier resistance was quite high, {similar to}0.6 {Omega}. The SQUIDs showed voltage periodicity versus magnetic field {ital H}{sub {perpendicular}} up to {similar to}80 K and had a maximum response of 30 {mu}V/{Phi}{sub 0} at {similar to}70 K, where {ital I}{sub {ital c}R{ital N}} was 30 {mu}V. The SQUID response versus {ital H}{sub {perpendicular}} was superimposed on a diffractionlike pattern of its junctions, indicating an improved uniformity in the junction cross section. When the SQUID was exposed to microwave radiation, many pronounced Shapiro steps were observed in the {ital I}-{ital V} curve, which modulated with the microwave power.

• OSTI ID: 6093936
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 59:27; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CUPRATES
CURRENTS
DIRECT CURRENT
ELECTRIC CURRENTS
ELECTRONIC EQUIPMENT
EQUIPMENT
FABRICATION
FLUXMETERS
HIGH-TC SUPERCONDUCTORS
LASER-PRODUCED PLASMA
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLASMA
QUATERNARY COMPOUNDS
SENSITIVITY
SILVER ADDITIONS
SILVER ALLOYS
SQUID DEVICES
SUPERCONDUCTING DEVICES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES