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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42 Citations (Scopus)

Abstract

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
Volume82
Issue number14
DOIs
Publication statusPublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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