Suppression of superconductivity due to enhanced Co doping in Cu0.5Tl0.5Ba2Ca2Cu3-yCoyO10-δ superconductors

Babar Shabbir, Anayat Ullah, Najmul Hassan, M. Irfan, Nawazish A. Khan

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Fluctuation Induced Conductivity (FIC) of Co-doped Cu 0.5Tl 0.5Ba 2Ca 2Cu 3-y Co y O 10-δ (y=0, 0.05, 0.1, 0.5) Superconductors have been studied as to find the possible cause of T c suppression in these compounds. We used Aslamazov-Larkin (AL) and Lawrence-Donaich (LD) equations to analyze the FIC of our samples. In this regard, it is observed that the data seems to fit well with 3D (three-dimensional) AL equations. In addition, crossover temperature from 2D to 3D has been found. The width of the temperature window for 3D conductivity is continuously decreasing with enhanced Co concentration. The shrinking of 3D temperature region with increased Co doping can be correlated with the suppression of superconductivity. It is observed that the coherence length and th interplanar coupling strength have also been decreased with increased Co doping, consistent with the magnetic pair-breaking effect.

Original languageEnglish
Pages (from-to)1521-1526
Number of pages6
JournalJournal of Superconductivity and Novel Magnetism
Issue number5
Publication statusPublished - 1 Jul 2011
Externally publishedYes


  • Crossover temperature
  • Cu Tl Ba Ca Cu Co O superconductors
  • Fluctuation induced conductivity
  • Interlayer coupling strength

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