Critical currents and irreversibility lines in Hg1-xTlxBa2(Ca0.86Sr 0.14)2Cu3O8+δ

K. H. Yoo, N. H. Hur, I. S. Kim, Y. B. Kim, Y. K. Park, J. C. Park, Y. Y. Song, S. C. Yu

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We report the temperature and magnetic field dependences of critical current densities Jc(H-, T) and the irreversibility lines Hirr(T) for Hg1-xTlxBa2(Ca0.86Sr 0.14)2Cu3O8+delta; (x = 0.0, 0.25, 0.50 and 0.75). The partial substitution of Tl for Hg leads to significant enhancement of Jc-and Hirr without changing Tc. This enhancement is attributed to an improvement in the flux pinning capability by the Tl doping. The temperature dependence of Jc and Hirr follows a power law: Jc ∝ (1 - T/Tc)v and Hirr ∝ (1 - T/Tc)α with the values of v and α decreasing as the Tl content increases.

Original languageEnglish
Pages (from-to)185-188
Number of pages4
JournalSolid State Communications
Issue number2
Publication statusPublished - 1996 Apr

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry


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