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American Institute of Physics, Journal of Applied Physics, 10(115), p. 103906

DOI: 10.1063/1.4868298

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Determination of the magnetic penetration depth in a superconducting Pb film

Journal article published in 2014 by Jérémy Brisbois, Bart Raes, Joris Van de Vondel ORCID, Victor V. Moshchalkov, Alejandro V. Silhanek
This paper is available in a repository.
This paper is available in a repository.

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Abstract

By 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 Λ 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. ; Peer reviewed