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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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| Authors: | R V Vovk Z F Nazyrov L I Goulatis A Chroneos |
| Affiliation: | 1. Kharkov National University, 4 Svoboda Sq., 61077, Kharkov, Ukraine 2. Department of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou str., Zografou, 157 80, Greece 3. Department of Materials, Imperial College, London, SW7 2AZ, UK |
| 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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