Determination of London penetration depth from ac susceptibility measurements of a square superconducting thin film

D. X. Chen, C. Navau, N. Del-Valle, A. Sanchez

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)

Abstract

A technique is developed for determining the London penetration depth by ac susceptibility measurements of a square film. It is based on the numerical calculation of the Meissner susceptibility of square superconducting films as a function of the Pearl length and the critical-state susceptibility of thin disks previously derived analytically. With this technique, intrinsic superconducting properties may be studied for each film together with critical-current density. The application of the technique to an actual YBa2Cu 3O7-δ film allows us to obtain its temperature dependent penetration depth and depairing current density. © 2014 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)9-13
JournalPhysica C: Superconductivity and its Applications
Volume500
DOIs
Publication statusPublished - 15 May 2014

Keywords

  • Ac susceptibility
  • London penetration depth
  • Pearl penetration depth
  • Superconducting film

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