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arXiv · 2001.08554

Properties of Grooved Dayem Bridge based YBa$_2$Cu$_3$O$_{7-\delta}$ Superconducting Quantum Interference Devices and Magnetometers

E. Trabaldo·S. Ruffieux·E. Andersson·R. Arpaia·D. Montemurro·J. F. Schneiderman·A. Kalaboukhov·D. Winkler·F. Lombardi·T. Bauch
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Abstract

The transport properties of a YBa$_2$Cu$_3$O$_{7-\delta}$ superconducting quantum interference device (SQUID) based on grooved Dayem bridge weak links are studied as a function of temperature: at high temperatures ($60~$K$<T<T_\mathrm{c}=89$~K) the weak links show properties similar to SNS junctions, while at temperatures below 60~K the weak links behave like short Dayem bridges. Using these devices, we have fabricated SQUID magnetometers with galvanically coupled in-plane pick-up loops: at $T=77$~K, magnetic field white noise levels as low as $63$~fT/$\sqrt{\mathrm{Hz}}$ have been achieved.

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E. Trabaldo, S. Ruffieux, E. Andersson, R. Arpaia, D. Montemurro, J. F. Schneiderman, A. Kalaboukhov, D. Winkler, F. Lombardi, T. Bauch. 2020-01-23. Properties of Grooved Dayem Bridge based YBa$_2$Cu$_3$O$_{7-\delta}$ Superconducting Quantum Interference Devices and Magnetometers. https://doi.org/10.1063/5.0001805

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