Superconducting transition temperature of co-doped Y0.95Pr 0.05Ba2(Cu1-xMnx)3O 7-δ superconductors for x ≤0.02

Bhasker Gahtori, R. Lal, S. K. Agarwal, Anirban Das, Tirthankar Chakraborty, Ashok Rao

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Abstract

Values of the superconducting transition temperature Tc extracted from the resistivity and ac susceptibility of Y0.95Pr 0.05Ba2(Cu1-xMnx)3O 7-δ (x ≤0.02) are found to follow the same qualitative variation with the Mn content. Both lead, in particular, to lower Tc for the x=0.005 sample than those of the x=0.0, 0.0075 and 0.01 samples. Comparing Tc with difference of resistivities with and without Pr for various x, it has been argued that electronic effects-dominate over the potential scattering in suppressing Tc below x=0.02. Superconducting volume fraction fg (as deduced through imaginary part χ′ of the ac susceptibility at the peak temperature) when considered in conjunction with the average grain size for the x=0.005 sample, indicates that the smaller size of the grains in x=0.005 sample leads to stronger fluctuations. This is an additional source for the larger Tc degradation in the x=0.005 sample.

Original languageEnglish
Pages (from-to)575-579
Number of pages5
JournalIndian Journal of Pure and Applied Physics
Volume46
Issue number8
Publication statusPublished - 01-08-2008

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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