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

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DOI: 10.4236/csta.2014.31004    3,731 Downloads   5,264 Views  

ABSTRACT

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.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

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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