Noise in YBa2Cu3O7- delta grain boundary junction DC SQUIDs

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

doi:10.1088/0953-2048/4/1S/035

Noise in YBa₂Cu₃O_{7- delta} grain boundary junction DC SQUIDs

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

University of Tübingen

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

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 language	English
Article number	035
Pages (from-to)	S148-S150
Journal	Superconductor Science and Technology
Volume	4
Issue number	1 S
DOIs	https://doi.org/10.1088/0953-2048/4/1S/035
State	Published - 1991
Externally published	Yes

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abstract = "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.",

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AU - Chaudhari, P.

AU - Kawasaki, M.

AU - Ketchen, M. B.

AU - Gupta, A.

PY - 1991

Y1 - 1991

N2 - 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.

AB - 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.

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U2 - 10.1088/0953-2048/4/1S/035

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IS - 1 S

M1 - 035

ER -

Noise in YBa₂Cu₃O_{7- delta} grain boundary junction DC SQUIDs

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