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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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 |
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