Development of high temperature superconducting Josephson junctions and quantum interference devices using low deposition temperature YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} barriers

Journal Article · Mon Apr 24 04:00:00 EDT 1995 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.113192· OSTI ID:45953

Reagor, D; Houlton, R; Springer, K; Hawley, M; Jia, Q X; Mombourquette, C; Garzon, F; Wu, X D ^[1]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

We have developed Josephson junctions and superconducting quantum interference devices (SQUIDs) in a superconductor-normal-superconductor edge-junction design. These devices are unusual in that we use YBa{sub 2}Cu{sub 3}O{sub 7}{minus}{ital x} for both the superconducting and normal layers. The only difference between the layers is the temperature of the substrate during deposition, 695 {degree}C for the superconductor and 670 {degree}C for the {ital N} layer. The lower deposition temperature results in material with a significantly reduced {ital T}{sub {ital c}} and a higher resistivity. The Josephson junctions produced in this fashion have {ital I}{sub {ital cR}}{sub {ital n}} products typically greater than 100 {mu}V at 77 K. The SQUIDs are not fully optimized but have produced modulation depths of approximately 10 {mu}V at 76 K. These SQUID results are similar to the best results in the literature.

• OSTI ID: 45953
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 17 Vol. 66; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARIUM OXIDES
COPPER OXIDES
DEPOSITION
ELECTRICAL PROPERTIES
FABRICATION
HIGH-TC SUPERCONDUCTORS
JOSEPHSON JUNCTIONS
SQUID DEVICES
TEMPERATURE DEPENDENCE
YTTRIUM OXIDES