## Abstract

Values of the superconducting transition temperature T_{c} extracted from the resistivity and ac susceptibility of Y_{0.95}Pr _{0.05}Ba_{2}(Cu_{1-x}Mn_{x})_{3}O _{7-δ} (x ≤0.02) are found to follow the same qualitative variation with the Mn content. Both lead, in particular, to lower T_{c} for the x=0.005 sample than those of the x=0.0, 0.0075 and 0.01 samples. Comparing T_{c} 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 T_{c} below x=0.02. Superconducting volume fraction f_{g} (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 T_{c} degradation in the x=0.005 sample.

Original language | English |
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Pages (from-to) | 575-579 |

Number of pages | 5 |

Journal | Indian Journal of Pure and Applied Physics |

Volume | 46 |

Issue number | 8 |

Publication status | Published - 01-08-2008 |

## All Science Journal Classification (ASJC) codes

- Physics and Astronomy (miscellaneous)

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_{0.05}Ba

_{2}(Cu

_{1-x}Mn

_{x})

_{3}O

_{7-δ}superconductors for x ≤0.02'. Together they form a unique fingerprint.