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Publication Detail
Three-dimensional nanoscale superconducting quantum interference device pickup loops
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Romans EJ, Osley EJ, Young L, Warburton PA, Li W
  • Publisher:
    AMER INST PHYSICS
  • Publication date:
    29/11/2010
  • Journal:
    APPL PHYS LETT
  • Volume:
    97
  • Issue:
    22
  • Print ISSN:
    0003-6951
  • Language:
    EN
  • Addresses:
    Romans, EJ
    UCL
    London Ctr Nanotechnol
    London
    WC1H 0AH
    England
Abstract
Nanoscale superconducting quantum interference devices (SQUIDs) have sensitivities approaching that required for single-spin detection, but they only measure fields perpendicular to their plane and can be difficult to tightly couple to magnetic sources on the same chip. To remove these limitations we used focused-ion-beam-induced chemical vapor deposition to directly write a SQUID structure with three-dimensional, freestanding pickup loops using superconducting tungsten nanowires. By applying a localized field, we investigated the pickup loop response, and found that it exhibits Meissner screening corresponding to a penetration depth lambda(T) consistent with BCS theory in the dirty limit and lambda(0) = 330 nm. (C) 2010 American Institute of Physics. [doi:10.1063/1.3521262]
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