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Practical high Tc Josephson junctions and dc SQUIDs operating above 85 K (1991)

Di Iorio, M. S. ; Yoshizumi, S. ; Yang, K-Y. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 58 (1991), S. 2552-2554

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Details

ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: Reproducible high Tc YBa2Cu3O7/Ag/YBa2Cu3O7 Josephson junctions have been fabricated using an entirely in situ step-edge technique. The junction process requires the deposition of a single high Tc film and the patterning is performed using standard photolithography and ion-beam etching. The junctions exhibit a well-defined supercurrent from 4.2 to 87 K and the ac Josephson effect is observed up to 80 K in response to microwave radiation. dc SQUIDs have been fabricated and show the expected periodic modulation of the critical current in a magnetic field at temperatures ranging from 4.2 to 85.7 K. All of the 56 devices fabricated and measured to date show a well-defined supercurrent from 4.2 to over 77 K.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.105231

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