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Investigating Double-Regime Crossover in Y1Ba2Cu3 - xRxO7 - δ Superconductors

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DOI: 10.4236/csta.2014.31004    3,825 Downloads   5,400 Views  


The effect of Pr and Gd doping on the transport properties of Cu-deficient YBCO superconductors has been studied. Two series of Y1Ba2Cu3 - xRxO7 - δ, where R = Pr or Gd, were prepared by the conventional solid-state reaction technique. Resistance measurements showed a suppression of Tc with increasing of Pr- and Gd-contents in addition to a normal-state metal-to-insulator transition. Moreover, a superconductor-to-insulator transition has been observed at ambient pressure for temperatures less than 50 K for Pr with x = 0.3 and for Gd with x > 0.3. The overall complex behaviours of the resistivity data have been preliminary explained in terms of localization of charge carriers, structural disorders, and magnetic ordering of magnetic moments.

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Badr, M. , El-Deen, L. , El-Hofy, M. and Haswa, A. (2014) Investigating Double-Regime Crossover in Y1Ba2Cu3 - xRxO7 - δ Superconductors. Crystal Structure Theory and Applications, 3, 30-37. doi: 10.4236/csta.2014.31004.


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