Critical currents and irreversibility lines in Hg 1-x Tl x Ba 2 (Ca 0.86 Sr 0.14 ) 2 Cu 3 O 8+δ

Kyung-hwa 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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Abstract

We report the temperature and magnetic field dependences of critical current densities J c (H-, T) and the irreversibility lines H irr (T) for Hg 1-x Tl x Ba 2 (Ca 0.86 Sr 0.14 ) 2 Cu 3 O 8+delta; (x = 0.0, 0.25, 0.50 and 0.75). The partial substitution of Tl for Hg leads to significant enhancement of J c -and H irr without changing T c . This enhancement is attributed to an improvement in the flux pinning capability by the Tl doping. The temperature dependence of J c and H irr follows a power law: J c ∝ (1 - T/T c ) v and H irr ∝ (1 - T/T c ) 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
Volume98
Issue number2
DOIs
Publication statusPublished - 1996 Jan 1

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All Science Journal Classification (ASJC) codes

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

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