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Publication Detail
Noise Performance of Niobium Nano-SQUIDs in Applied Magnetic Fields
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Romans EJ, Rozhko S, Young L, Blois A, Hao L, Cox D, Gallop JC
  • Publisher:
    IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
  • Publication date:
    06/2011
  • Pagination:
    404, 407
  • Journal:
    IEEE T APPL SUPERCON
  • Volume:
    21
  • Issue:
    3
  • Print ISSN:
    1051-8223
  • Language:
    EN
  • Keywords:
    Magnetic field sensitivity, nanoscale SQUID, superconducting quantum interference device, QUANTUM INTERFERENCE DEVICE
  • Addresses:
    Romans, EJ
    UCL
    London Ctr Nanotechnol
    London
    WC1H 0AH
    England
Abstract
We have fabricated two different designs of niobium dc nano-SQUIDs using focussed ion beam (FIB) lithography with loops and track widths down to 70 nm. We report on the voltage-flux and noise performance of the devices in zero field and with magnetic fields of up to 1 T applied either in-plane or perpendicular to the plane at temperatures between 5 K and 9 K. We compare the measurements with modeled estimates of the inductance of the structures and the conventional theory of noise in dc SQUIDs.
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