Vortex pinning regimes in thin films of YBa2Cu3O7-δ

F. C. Klaassen*, G. Doornbos, J. M. Huijbregtse, B. Dam, R. Griessen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

The field dependence of the superconducting current density js(B)and the pinning energy UC(B) in thin films of YBa2Cu3O7-δindicates three different pinning regimes. At low fields, μH < B* ≈ 0.7nd0s the density of dislocations), jsB) is constant and Uc = 600 K at T 0 for all YBa2Cu3O7-δfilms, independent of the density of dislocations. This is much lower than the pinning energy of a vortex in a single dislocation, for which Uc ≈ 6000 K. At intermediate fields, B* < μ0H < 0.5 T, a sharp decrease of Uc is observed. For μ0H > 0.5 T, Uc(B) is constant again, with UC(B) ≈ 80 K for sputtered films and UC(B) ≈ 200 K for laser ablated films.

Original languageEnglish
Pages (from-to)1463-1464
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Volume341-348
Issue numberPART 2
DOIs
Publication statusPublished - 2000

Bibliographical note

Funding Information:
We thank S. Freisem and J. Aarts of the University of Leiden for providing the sputtered sample. This work is part of the research program of FOM (Fundamenteel Onderzoek der Materie), which is financially supported by NWO (Nederlands Wetenschappelijk Onderzoek).

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