dc SQUID made of Ag-doped YBa sub 2 Cu sub 3 O sub 7 a - b plane-edge junctions
- 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), Vol. 59:27; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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BARIUM OXIDES
SQUID DEVICES
CUPRATES
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FABRICATION
LASER-PRODUCED PLASMA
QUATERNARY COMPOUNDS
SENSITIVITY
SILVER ADDITIONS
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MICROWAVE EQUIPMENT
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
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665412* - Superconducting Devices- (1992-)