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

(2) Kamerlingh Onnes Laboratorium; B.L.T. Plourde (1); C. Song (1); K. Yu (1); Leiden University; M.B.S. Hesselberth (2); M.P. DeFeo (1); P.H. Kes (2) ((1) Department of Physics; Syracuse; Syracuse University

arxiv: 0809.1852 · v1 · submitted 2008-09-10 · ❄️ cond-mat.supr-con

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

T.W. Heitmann (1) , K. Yu (1) , C. Song (1) , M.P. DeFeo (1) , B.L.T. Plourde (1) , M.B.S. Hesselberth (2) , P.H. Kes (2) ((1) Department of Physics , Syracuse University

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Syracuse (2) Kamerlingh Onnes Laboratorium Leiden University the Netherlands)

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classification ❄️ cond-mat.supr-con

keywords channelpicovoltmetercorbinosinglesuperconductingvortexvorticesweak-pinning

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We have developed a picovoltmeter using a Nb dc Superconducting QUantum Interference Device (SQUID) 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.

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

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