High sensitivity double relaxation oscillation superconducting quantum interference devices

Derk Jan Adelerhof; Jun Kawai; Gen Uehara; Hisashi Kado

doi:10.1063/1.112582

High sensitivity double relaxation oscillation superconducting quantum interference devices

Derk Jan Adelerhof, Jun Kawai, Gen Uehara, Hisashi Kado

Faculty of Science and Technology

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Abstract

Double relaxation oscillation superconducting quantum interference devices (SQUIDs) (DROSs) have been fabricated with estimated relaxation frequencies up to 14 GHz. Both the intrinsic flux noise and the performance in a flux locked loop with direct voltage readout have been studied. In flux locked loop, a noise level of 0.55 μφ0/√Hz corresponding to an energy sensitivity of 34 h has been obtained for a DROS with a SQUID inductance of 29 pH. The intrinsic sensitivity improves with increasing relaxation frequency, leveling off to a value of 13 h at relaxation frequencies higher than about 3 GHz.

Original language	English
Pages (from-to)	2606-2608
Number of pages	3
Journal	Applied physics letters
Volume	65
Issue number	20
DOIs	https://doi.org/10.1063/1.112582
Publication status	Published - 1994

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Adelerhof, D. J., Kawai, J., Uehara, G., & Kado, H. (1994). High sensitivity double relaxation oscillation superconducting quantum interference devices. Applied physics letters, 65(20), 2606-2608. https://doi.org/10.1063/1.112582

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abstract = "Double relaxation oscillation superconducting quantum interference devices (SQUIDs) (DROSs) have been fabricated with estimated relaxation frequencies up to 14 GHz. Both the intrinsic flux noise and the performance in a flux locked loop with direct voltage readout have been studied. In flux locked loop, a noise level of 0.55 μφ0/√Hz corresponding to an energy sensitivity of 34 h has been obtained for a DROS with a SQUID inductance of 29 pH. The intrinsic sensitivity improves with increasing relaxation frequency, leveling off to a value of 13 h at relaxation frequencies higher than about 3 GHz.",

author = "Adelerhof, {Derk Jan} and Jun Kawai and Gen Uehara and Hisashi Kado",

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N2 - Double relaxation oscillation superconducting quantum interference devices (SQUIDs) (DROSs) have been fabricated with estimated relaxation frequencies up to 14 GHz. Both the intrinsic flux noise and the performance in a flux locked loop with direct voltage readout have been studied. In flux locked loop, a noise level of 0.55 μφ0/√Hz corresponding to an energy sensitivity of 34 h has been obtained for a DROS with a SQUID inductance of 29 pH. The intrinsic sensitivity improves with increasing relaxation frequency, leveling off to a value of 13 h at relaxation frequencies higher than about 3 GHz.

AB - Double relaxation oscillation superconducting quantum interference devices (SQUIDs) (DROSs) have been fabricated with estimated relaxation frequencies up to 14 GHz. Both the intrinsic flux noise and the performance in a flux locked loop with direct voltage readout have been studied. In flux locked loop, a noise level of 0.55 μφ0/√Hz corresponding to an energy sensitivity of 34 h has been obtained for a DROS with a SQUID inductance of 29 pH. The intrinsic sensitivity improves with increasing relaxation frequency, leveling off to a value of 13 h at relaxation frequencies higher than about 3 GHz.

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DO - 10.1063/1.112582

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10.1063/1.112582

Adelerhof1994high
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