Central peak position in magnetization loops of high-Tcsuperconductors

D. V. Shantsev, M. R. Koblischka, Y. M. Galperin, T. H. Johansen, L. Pust, M. Jirsa

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Exact analytical results are obtained for the magnetization of a superconducting thin strip with a general behavior Jc(B) of the critical current density. We show that within the critical-state model the magnetization as a function of applied field, Ba has an extremum located exactly at Ba= 0. This result is in excellent agreement with presented experimental data for a YBa2Cu3O7-δthin film. After introducing granularity by patterning the film, the central peak becomes shifted to positive fields, Bcp< 0, on the descending field branch of the loop. Our results show that a positive Bcpis a definite signature of granularity in superconductors.

Original languageEnglish
Pages (from-to)2947-2950
Number of pages4
JournalPhysical Review Letters
Issue number14
Publication statusPublished - 1999 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Shantsev, D. V., Koblischka, M. R., Galperin, Y. M., Johansen, T. H., Pust, L., & Jirsa, M. (1999). Central peak position in magnetization loops of high-Tcsuperconductors. Physical Review Letters, 82(14), 2947-2950. https://doi.org/10.1103/PhysRevLett.82.2947