University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Investigating the intrinsic noise limit of Dayem bridge NanoSQUIDs

Patel, T, Li, B, Gallop, J, Cox, D, Kirkby, K, Romans, E, Chen, J, Nisbet, A and Hao, L (2015) Investigating the intrinsic noise limit of Dayem bridge NanoSQUIDs IEEE Transactions on Applied Superconductivity, 25 (3).

Full text not available from this repository.

Abstract

© 2014 IEEE.NanoSQUIDs made from Nb thin films have been produced with nanometre loop sizes down to 200 nm, using weak-link junctions with dimensions less than 60 nm. These composite (W/Nb) single layer thin film devices, patterned by FIB milling, show extremely good low-noise performance ~170 nΦ0 at temperatures between 5 and 8.5 K and can operate in rather high magnetic fields (at least up to 1 T). The devices produced so far have a limited operating temperature range, typically only 1-2 K. We have the goal of achieving operation at 4.2 K, to be compatible with the best SQUID series array (SSA) preamplifier available. Using the SSA to readout the nanoSQUIDs provides us with a means of investigating the intrinsic noise of the former. In this paper we report improved white noise levels of these nanoSQUIDs, enabling potential detection of a single electronic spin flip in a 1-Hz bandwidth. At low frequencies the noise performance is already limited by SSA preamplifier noise.

Item Type: Article
Authors :
NameEmailORCID
Patel, TUNSPECIFIEDUNSPECIFIED
Li, BUNSPECIFIEDUNSPECIFIED
Gallop, JUNSPECIFIEDUNSPECIFIED
Cox, Dd.cox@surrey.ac.ukUNSPECIFIED
Kirkby, KUNSPECIFIEDUNSPECIFIED
Romans, EUNSPECIFIEDUNSPECIFIED
Chen, JUNSPECIFIEDUNSPECIFIED
Nisbet, Aa.nisbet@surrey.ac.ukUNSPECIFIED
Hao, LUNSPECIFIEDUNSPECIFIED
Date : 1 June 2015
Identification Number : https://doi.org/10.1109/TASC.2014.2364920
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:33
Last Modified : 17 May 2017 15:11
URI: http://epubs.surrey.ac.uk/id/eprint/839664

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800