Grooved dayem nanobridges as building blocks of high-performance YBa <inf>2</inf> Cu <inf>3</inf> O <inf>7-δ</inf> SQUID magnetometers
Artikel i vetenskaplig tidskrift, 2019

We present noise measurements performed on a YBa 2 Cu 3 O 7-δ nanoscale weak-link-based magnetometer consisting of a superconducting quantum interference device (SQUID) galvanically coupled to a 3.5 × 3.5 mm 2 pick-up loop, reaching white flux noise levels and magnetic noise levels as low as 6μÎ0/Hz and 100 fT/Hz at T = 77 K, respectively. The low noise is achieved by introducing grooved Dayem bridges (GDBs), a new concept of a weak link. A fabrication technique has been developed for the realization of nanoscale grooved bridges, which substitutes standard Dayem bridge weak links. The introduction of these novel key blocks reduces the parasitic inductance of the weak links and increases the differential resistance of the SQUIDs. This greatly improves the device performance, thus resulting in a reduction of the white noise.

magnetometer

YBCO

grooved Dayem bridge

SQUID

High-Tc

Författare

Edoardo Trabaldo

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Christoph Pfeiffer

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Eric Andersson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Riccardo Arpaia

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Politecnico di Milano

Alexei Kalaboukhov

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Dag Winkler

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Floriana Lombardi

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Thilo Bauch

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Nano Letters

1530-6984 (ISSN) 1530-6992 (eISSN)

Ämneskategorier

Signalbehandling

Annan elektroteknik och elektronik

Den kondenserade materiens fysik

DOI

10.1021/acs.nanolett.8b04991

Mer information

Senast uppdaterat

2019-03-27