Relaxation oscillation SQUIDs with high δV/δΦ

D.J. Adelerhof; H. Nijstad; J. Flokstra; H. Rogalla

doi:10.1109/77.233318

Relaxation oscillation SQUIDs with high δV/δΦ

D.J. Adelerhof, H. Nijstad, J. Flokstra, H. Rogalla

Faculty of Science and Technology

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

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Abstract

Relaxation oscillation SQUIDs (ROSs) based on Nb/Al, AlO_x/Al/Nb Josephson tunnel junctions have been designed and fabricated. The hysteretic SQUIDs (superconducting quantum interference devices) have a maximum critical current of about 130 μA and an inductance of 20 pH. A voltage modulation of 40 μV and a flux to voltage transfer δV/δΦ of 4 MV/Φ₀ have been measured in these SQUIDs. Double relaxation oscillation SQUIDs (DROSs), which are based on two hysteretic SQUIDs, showed transfer coefficients up to 77 mV/Φ₀. The intrinsic white flux noise of the DROSs is smaller than 3-5 μΦ₀/√Hz. It is noted that the results are very promising for a next generation of SQUID systems with simplified read-out.

Original language	English
Pages (from-to)	1862-1865
Number of pages	4
Journal	IEEE transactions on applied superconductivity
Volume	3
Issue number	1
DOIs	https://doi.org/10.1109/77.233318
Publication status	Published - 1993
Event	1992 Applied Superconductivity Conference, ASC 1992 - Chicago, United States Duration: 23 Aug 1992 → 28 Aug 1992

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Adelerhof1993relaxation
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title = "Relaxation oscillation SQUIDs with high δV/δΦ",

abstract = "Relaxation oscillation SQUIDs (ROSs) based on Nb/Al, AlOx/Al/Nb Josephson tunnel junctions have been designed and fabricated. The hysteretic SQUIDs (superconducting quantum interference devices) have a maximum critical current of about 130 μA and an inductance of 20 pH. A voltage modulation of 40 μV and a flux to voltage transfer δV/δΦ of 4 MV/Φ0 have been measured in these SQUIDs. Double relaxation oscillation SQUIDs (DROSs), which are based on two hysteretic SQUIDs, showed transfer coefficients up to 77 mV/Φ0. The intrinsic white flux noise of the DROSs is smaller than 3-5 μΦ0/√Hz. It is noted that the results are very promising for a next generation of SQUID systems with simplified read-out.",

author = "D.J. Adelerhof and H. Nijstad and J. Flokstra and H. Rogalla",

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T1 - Relaxation oscillation SQUIDs with high δV/δΦ

AU - Adelerhof, D.J.

AU - Nijstad, H.

AU - Flokstra, J.

AU - Rogalla, H.

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Y1 - 1993

N2 - Relaxation oscillation SQUIDs (ROSs) based on Nb/Al, AlOx/Al/Nb Josephson tunnel junctions have been designed and fabricated. The hysteretic SQUIDs (superconducting quantum interference devices) have a maximum critical current of about 130 μA and an inductance of 20 pH. A voltage modulation of 40 μV and a flux to voltage transfer δV/δΦ of 4 MV/Φ0 have been measured in these SQUIDs. Double relaxation oscillation SQUIDs (DROSs), which are based on two hysteretic SQUIDs, showed transfer coefficients up to 77 mV/Φ0. The intrinsic white flux noise of the DROSs is smaller than 3-5 μΦ0/√Hz. It is noted that the results are very promising for a next generation of SQUID systems with simplified read-out.

AB - Relaxation oscillation SQUIDs (ROSs) based on Nb/Al, AlOx/Al/Nb Josephson tunnel junctions have been designed and fabricated. The hysteretic SQUIDs (superconducting quantum interference devices) have a maximum critical current of about 130 μA and an inductance of 20 pH. A voltage modulation of 40 μV and a flux to voltage transfer δV/δΦ of 4 MV/Φ0 have been measured in these SQUIDs. Double relaxation oscillation SQUIDs (DROSs), which are based on two hysteretic SQUIDs, showed transfer coefficients up to 77 mV/Φ0. The intrinsic white flux noise of the DROSs is smaller than 3-5 μΦ0/√Hz. It is noted that the results are very promising for a next generation of SQUID systems with simplified read-out.

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