Substrate step-edge YBa2Cu3O7 rf SQUIDs

We have developed a technique which permits high-yield fabrication of microbridges and low noise YBa2Cu3O7 superconducting quantum interference devices (SQUIDs) in epitaxial thin films. These SQUIDs operate over a wide temperature range extending from 4 K to close to the superconducting transition t...

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Bibliographic Details
Published in:Applied physics letters 1991-02, Vol.58 (5), p.543-545
Main Authors: DALY, K. P, DOZIER, W. D, BURCH, J. F, COONS, S. B, HU, R, PLATT, C. E, SIMON, R. W
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Other topics in superconductivity
Physics
Superconductivity
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Summary:We have developed a technique which permits high-yield fabrication of microbridges and low noise YBa2Cu3O7 superconducting quantum interference devices (SQUIDs) in epitaxial thin films. These SQUIDs operate over a wide temperature range extending from 4 K to close to the superconducting transition temperature. Measurements of an rf SQUID operating at 77 K give a peak-to-peak flux sensitivity of 36 μV/Φ0 and a flux noise at 10 Hz of 1.5× 10−4 Φ0/√Hz. Device yields over 80% have been obtained.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.104581