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
High-Tc
magnetometer
HTS
SQUID
grooved Dayem bridge
Author
Edoardo Trabaldo
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Christoph Pfeiffer
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Eric Andersson
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Maxim Chukharkin Leonidovich
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Riccardo Arpaia
University of Naples Federico II
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
D. Montemurro
University of Naples Federico II
Alexei Kalaboukhov
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Dag Winkler
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Floriana Lombardi
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Thilo Bauch
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
IEEE Transactions on Applied Superconductivity
1051-8223 (ISSN)
Vol. 30 7 9126148Nano-MEG Nano-scale patterned high critical-temperature superconducting sensor technology for next generation neuroimaging with magnetoencephalography
European Commission (Horizon 2020), 2019-05-20 -- 2020-05-19.
Evolution of nanoscale charge order in superconducting YBCO nanostructures
Swedish Research Council (VR), 2017-07-01 -- 2020-06-30.
Subject Categories
Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/TASC.2020.3004896