Determination of the magnetic penetration depth in a superconducting Pb film

Journal Article · Fri Mar 14 04:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4868298· OSTI ID:22277903

Silhanek, A. V. ^[1]; Raes, B.; Van de Vondel, J.; Moshchalkov, V. V. ^[2]

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1. Département de Physique, Université de Liège, B-4000 Sart Tilman, Liège (Belgium)
2. INPAC–Institute for Nanoscale Physics and Chemistry, Nanoscale Superconductivity and Magnetism Group, K.U. Leuven, Celestijnenlaan 200D, B–3001 Leuven (Belgium)

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 λ{sub L} coincides with the values previously reported for bulk Pb once the kinetic suppression of the order parameter is properly taken into account.

• OSTI ID: 22277903
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 10 Vol. 115; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HALL EFFECT
LEAD
MAGNETIC FIELDS
MEISSNER-OCHSENFELD EFFECT
MICROSCOPY
ORDER PARAMETERS
PENETRATION DEPTH
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SUPERCONDUCTORS