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A nanoscale SQUID operating at high magnetic fields

journal contribution
posted on 2011-11-11, 00:00 authored by S Lam, J Clem, Wenrong YangWenrong Yang
A washer-free Nb nanoSQUID has been developed for measuring magnetization changes from nanoscale objects. The SQUID loop is etched into a 250 nm wide Au/Nb bilayer track and the diameter of the SQUID hole is ~ 70 nm. In the presence of a magnetic field perpendicular to the plane of the SQUID, vortex penetration into the 250 nm wide track can be observed via the critical current–applied field characteristic and the value at which vortex first penetrates is consistent with the theoretical prediction. Upon removing the applied field, the penetrated vortices escape the track and the critical current at zero field is restored.

History

Journal

Nanotechnology

Volume

22

Issue

45

Pagination

1 - 5

Publisher

Institute of Physics Publishing

Location

Bristol, Endland

ISSN

0957-4484

eISSN

1361-6528

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2011, IOP Publishing Ltd