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Determination of the magnetic penetration depth in a superconducting Pb film

AuthorsBrisbois, J.; Raes, Bart; Vondel, Joris van de ; Moshchalkov, V. V.; Silhanek, A. V.
Issue Date2014
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 115(10): 103906 (2014)
AbstractBy means of scanning Hall probe microscopy technique, we accurately map the magnetic field pattern produced by Meissner screening currents in a thin superconducting Pb stripe. The obtained field profile allows us to quantitatively estimate the Pearl length ¿ without the need of pre-calibrating the Hall sensor. This fact contrasts with the information acquired through the spatial field dependence of an individual flux quantum where the scanning height and the magnetic penetration depth combine in a single inseparable parameter. The derived London penetration depth λL coincides with the values previously reported for bulk Pb once the kinetic suppression of the order parameter is properly taken into account.
DescriptionUnder the terms of the Creative Commons Attribution (CC BY) license to their work.
Publisher version (URL)http://dx.doi.org/10.1063/1.4868298
Identifiersdoi: 10.1063/1.4868298
issn: 0021-8979
e-issn: 1089-7550
Appears in Collections:(CIN2) Artículos
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