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Three-dimensional nanoscale superconducting quantum interference device pickup loops

Romans, EJ; Osley, EJ; Young, L; Warburton, PA; Li, W; (2010) Three-dimensional nanoscale superconducting quantum interference device pickup loops. APPL PHYS LETT , 97 (22) , Article 222506. 10.1063/1.3521262.

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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]

Type:Article
Title:Three-dimensional nanoscale superconducting quantum interference device pickup loops
DOI:10.1063/1.3521262
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology

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