SQUID magnetometer based on Grooved Dayem nanobridges and a flux transformer
Journal article, 2020

We report noise measurements performed on a superconducting quantum interference devices (SQUID) magnetometer implementing YBa2Cu3O7-δ grooved Dayem nanobridges as weak links. The magnetometer is realized by coupling the SQUID to a flux transformer with a two-level coupling scheme using a flip-chip approach to improve the effective area of the SQUID. The measured magnetic flux noise of the SQUID is as low as 10 μ Φ0/√Hz, which corresponds to an equivalent magnetic field white noise of 60 fT/√Hz above 100 Hz at T=77 K.

YBCO

HTS

SQUID

grooved Dayem bridge

High-Tc

magnetometer

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Published in

IEEE Transactions on Applied Superconductivity

1051-8223 (ISSN) 15582515 (eISSN)

Vol. 30 Issue 7 art. no 9126148

Research Project(s)

Nano-MEG Nano-scale patterned high critical-temperature superconducting sensor technology for next generation neuroimaging with magnetoencephalography

European Commission (EC) (EC/H2020/777222), 2019-05-20 -- 2020-05-19.

Evolution of nanoscale charge order in superconducting YBCO nanostructures

Swedish Research Council (VR) (2017-00382), 2017-07-01 -- 2020-06-30.

Categorizing

Subject Categories (SSIF 2011)

Other Physics Topics

Electrical Engineering, Electronic Engineering, Information Engineering

Identifiers

DOI

10.1109/TASC.2020.3004896

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4/5/2022 5