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Effect of Praseodymium Concentration on the Excess Conductivity Near the Critical Temperature of Y1−z Pr z Ba2Cu3O7−δ Single Crystals

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Abstract

The evolution of the excess conductivity in Y1−z Pr z Ba2Cu3O7−δ single crystals has been studied by systematically increasing the praseodymium concentration (0.05≤z≤0.5). The concentration dependence of the coherence length along c axis ξ c (0) on the praseodymium content has been determined. The praseodymium concentration reduction from 0.0 to 0.5 results in a substantial broadening of the temperature interval where the excess conductivity takes place. The ξ c (0) value increases more than fourfold and the 2D–3D crossover point is shifted in temperature.

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Acknowledgements

This work was supported in part by European Commission CORDIS Seven Framework Program, Project No. 247556.

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Authors and Affiliations

  1. Kharkov National University, 4 Svoboda Sq., 61077, Kharkov, Ukraine

    R. V. Vovk & Z. F. Nazyrov

  2. Department of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou str., Zografou, 157 80, Greece

    L. I. Goulatis

  3. Department of Materials, Imperial College, London, SW7 2AZ, UK

    A. Chroneos

Authors
  1. R. V. Vovk
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  2. Z. F. Nazyrov
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  3. L. I. Goulatis
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  4. A. Chroneos
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Correspondence to A. Chroneos.

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Vovk, R.V., Nazyrov, Z.F., Goulatis, L.I. et al. Effect of Praseodymium Concentration on the Excess Conductivity Near the Critical Temperature of Y1−z Pr z Ba2Cu3O7−δ Single Crystals. J Low Temp Phys 170, 216–222 (2013). https://doi.org/10.1007/s10909-012-0755-8

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  • DOI: https://doi.org/10.1007/s10909-012-0755-8

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