Determination of the magnetic penetration depth with measurements of the vortex-penetration field for type-II superconductors

Abstract

Using a known distribution of the Meissner currents over the surface of an infinitely long superconducting slab with a rectangular cross section, we find an applied magnetic field at which vortices begin to penetrate into the superconductor. This vortex-penetration field is determined by an interplay of the geometrical and Bean-Livingston barriers. The obtained results enable one to find the lower critical field and the London penetration depth from measurements of the magnetic induction on the surface of the superconducting slab, using, e.g., the micro-Hall probes.

arXiv comment11 pages, 9 figures. There are changes in the text, Fig.8, and in the list of references. To be published in PRB

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Cited by in corpus (2)

• Impact of border defects on the magnetic flux penetration in superconducting films
• Determination of the London penetration depth with the tunnel diode oscillator technique