Superconducting quantum interference devices based on YBaCuO nanobridges

M.V. Pedyash; D.H.A. Blank; H. Rogalla

doi:10.1063/1.115708

Superconducting quantum interference devices based on YBaCuO nanobridges

M.V. Pedyash, D.H.A. Blank, H. Rogalla

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Abstract

Direct current SQUIDs based on YBaCuO thin film nanobridges have been investigated. Critical current densities Jc of the devices are up to 3×106 A/cm2 at T=77 K and show a temperature dependence of (1−T/Tc)1.6±0.1. High values of the voltage‐flux modulation are observed (8 μV peak to peak at 77 K, 45 μV at 4.2 K). The temperature dependence of the SQUID modulation is found to be essentially different from the one of the conventional weak link SQUID. We discuss our results by considering degradation of the nanobridge area during structuring, which leads to a transition from SNS to SS′S type junction with decreasing temperature.

Original language	English
Pages (from-to)	1156-1158
Number of pages	3
Journal	Applied physics letters
Volume	68
Issue number	8
DOIs	https://doi.org/10.1063/1.115708
Publication status	Published - 1996

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title = "Superconducting quantum interference devices based on YBaCuO nanobridges",

abstract = "Direct current SQUIDs based on YBaCuO thin film nanobridges have been investigated. Critical current densities Jc of the devices are up to 3×106 A/cm2 at T=77 K and show a temperature dependence of (1−T/Tc)1.6±0.1. High values of the voltage‐flux modulation are observed (8 μV peak to peak at 77 K, 45 μV at 4.2 K). The temperature dependence of the SQUID modulation is found to be essentially different from the one of the conventional weak link SQUID. We discuss our results by considering degradation of the nanobridge area during structuring, which leads to a transition from SNS to SS′S type junction with decreasing temperature.",

author = "M.V. Pedyash and D.H.A. Blank and H. Rogalla",

year = "1996",

doi = "10.1063/1.115708",

language = "English",

volume = "68",

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journal = "Applied physics letters",

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publisher = "American Institute of Physics",

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T1 - Superconducting quantum interference devices based on YBaCuO nanobridges

AU - Pedyash, M.V.

AU - Blank, D.H.A.

AU - Rogalla, H.

PY - 1996

Y1 - 1996

N2 - Direct current SQUIDs based on YBaCuO thin film nanobridges have been investigated. Critical current densities Jc of the devices are up to 3×106 A/cm2 at T=77 K and show a temperature dependence of (1−T/Tc)1.6±0.1. High values of the voltage‐flux modulation are observed (8 μV peak to peak at 77 K, 45 μV at 4.2 K). The temperature dependence of the SQUID modulation is found to be essentially different from the one of the conventional weak link SQUID. We discuss our results by considering degradation of the nanobridge area during structuring, which leads to a transition from SNS to SS′S type junction with decreasing temperature.

AB - Direct current SQUIDs based on YBaCuO thin film nanobridges have been investigated. Critical current densities Jc of the devices are up to 3×106 A/cm2 at T=77 K and show a temperature dependence of (1−T/Tc)1.6±0.1. High values of the voltage‐flux modulation are observed (8 μV peak to peak at 77 K, 45 μV at 4.2 K). The temperature dependence of the SQUID modulation is found to be essentially different from the one of the conventional weak link SQUID. We discuss our results by considering degradation of the nanobridge area during structuring, which leads to a transition from SNS to SS′S type junction with decreasing temperature.

U2 - 10.1063/1.115708

DO - 10.1063/1.115708

M3 - Article

SN - 0003-6951

VL - 68

SP - 1156

EP - 1158

JO - Applied physics letters

JF - Applied physics letters

IS - 8

ER -

Superconducting quantum interference devices based on YBaCuO nanobridges

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