Properties of grooved Dayem bridge based YBa2Cu3O7-δ superconducting quantum interference devices and magnetometers

被引：21
作者：
Trabaldo, E. [1 ]
Ruffieux, S. [1 ]
Andersson, E. [1 ]
Arpaia, R. [1 ,2 ]
Montemurro, D. [1 ,5 ]
Schneiderman, J. F. [3 ,4 ]
Kalaboukhov, A. [1 ]
Winkler, D. [1 ]
Lombardi, F. [1 ]
Bauch, T. [1 ]
机构：
[1] Chalmers Univ Technol, Dept Microtechnol & Nanosci, Quantum Device Phys Lab, SE-41296 Gothenburg, Sweden
[2] Politecn Milan, Dipartimento Fis, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy
[3] Univ Gothenburg, Sahlgrenska Acad, MedTech West, SE-40530 Gothenburg, Sweden
[4] Univ Gothenburg, Sahlgrenska Acad, Inst Neurosci & Physiol, SE-40530 Gothenburg, Sweden
[5] Univ Napoli Federico II, Dipartimento Fis, Via Cinthia, I-80126 Naples, Italy
来源：
APPLIED PHYSICS LETTERS | 2020年 / 116卷 / 13期
基金：
瑞典研究理事会;
关键词：
DC; SQUID; NOISE;
D O I：
10.1063/5.0001805
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The transport properties of a YBa2Cu3-delta superconducting quantum interference device (SQUID) based on grooved Dayem bridge weak links are studied as a function of temperature: at high temperatures (60 = 89 K), the weak links show properties similar to superconductor-normal conductor-superconductor junctions, while at temperatures below 60K, the weak links behave like short Dayem bridges. Using these devices, we have fabricated SQUID magnetometers with galvanically coupled in-plane pickup loops: at T=77K, magnetic field white noise levels as low as 63 fT/Hz have been achieved.
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页数：5
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