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.
SQUID Magnetometer Based on Grooved Dayem Nanobridges and a Flux Transformer / Trabaldo, E.; Pfeiffer, C.; Andersson, E.; Chukharkin, M.; Arpaia, R.; Montemurro, D.; Kalaboukhov, A.; Winkler, D.; Lombardi, F.; Bauch, T.. - In: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY. - ISSN 1051-8223. - 30:7(2020). [10.1109/TASC.2020.3004896]
SQUID Magnetometer Based on Grooved Dayem Nanobridges and a Flux Transformer
Montemurro D.;
2020
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
