Noise in YBa2Cu3O7- delta grain boundary junction DC SQUIDs

R. Gross, P. Chaudhari, M. Kawasaki, M. B. Ketchen, A. Gupta

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The authors have fabricated low noise YBa2Cu3O 7- delta grain boundary junction DC-SQUIDs with a square washer geometry design. The SQUIDs show perfectly periodic voltage-flux characteristics from 4.2 to 87 K. The noise characteristics of these SQUIDs have been measured as a function of temperature, bias current, and applied magnetic flux. Above about 82 K the noise is dominated by flux noise presumably caused by thermally assisted flux motion in the film. Below this temperature the SQUID noise is dominated by voltage noise across the junctions.

Original languageEnglish
Article number035
Pages (from-to)S148-S150
JournalSuperconductor Science and Technology
Issue number1 S
StatePublished - 1991
Externally publishedYes


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