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Picovoltmeter for probing vortex dynamics in a single weak-pinning Corbino channel

Rev. Sci. Instrum. 79, 103906 (2008); doi:10.1063/1.3000683

Published 23 October 2008

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T. W. Heitmann,1 K. Yu,1 C. Song,1 M. P. DeFeo,1 B. L. T. Plourde,1 M. B. S. Hesselberth,2 and P. H. Kes2
1Department of Physics, Syracuse University, Syracuse, New York 13244-1130, USA
2Kamerlingh Onnes Laboratorium, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands

We have developed a picovoltmeter using a Nb dc superconducting quantum interference device for measuring the flux-flow voltage from a small number of vortices moving through a submicron weak-pinning superconducting channel. We have applied this picovoltmeter to measure the vortex response in a single channel arranged in a circle on a Corbino disk geometry. The circular channel allows the vortices to follow closed orbits without encountering any sample edges, thus eliminating the influence of entry barriers. ©2008 American Institute of Physics
History: Received 1 August 2008; accepted 25 September 2008; published 23 October 2008
Permalink: http://link.aip.org/link/?RSINAK/79/103906/1
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KEYWORDS and PACS

Keywords
PACS
  • 74.25.Qt
    Vortex lattices, flux pinning, flux creep
  • 72.15.Gd
    Galvanomagnetic and other magnetotransport effects (metals/alloys)
  • 85.25.Dq
    Superconducting quantum interference devices (SQUIDs)
  • YEAR: 2008

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PUBLICATION DATA

ISSN:
0034-6748 (print)   1089-7623 (online)
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REFERENCES (16)

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