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Excess conductivity of Y0.95Pr0.05Ba2Cu3O7-x single crystals

Ruslan V. Vovk 1Mykhaylo A. Obolenskii 1Alexander V. Bondarenko 1Ioannis L. Goulatis 1Alexander Chroneos 2,3

1. Kharkov National University, 4 Svoboda Sq., Kharkov 61077, Ukraine
2. Imperial College London, Department of Materials, London, United Kingdom
3. IMEL, NCSR Demokritos, Aghia Paraskevi, Athens 15310, Greece


In this work the in-plane conductivity of YВaCuO and Y1-zPrzBa2Cu3O7-x single crystals with a system of unidirectional twin boundaries was investigated. The results indicate that the partial substitution of Y by Pr results to the formation of two superconducting phases with different critical temperatures. The Pr dopants behave as efficient scattering centers of normal and fluctuating carriers. For this, a slight doping with praseodymium (till z ≈0.05) results to a significant narrowing of the temperature interval in which the pseudo-gap regime is realized in the ab-plane of YBaCuO single crystals.


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Presentation: Poster at E-MRS Fall Meeting 2006, Symposium K, by Alexander Chroneos
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-15 08:13
Revised:   2009-06-07 00:44