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Fluctuation-induced conductivity of (YCe)Ba2Cu3O7–δ superconductor by Talita Rosas Ferreira; Lincoln Brum de Leite Gusmão Pinheiro; Pedro Rodrigues Júnior; Francisco Carlos Serbena; Alcione Roberto Jurelo is a Physics and Astronomy article available to read on EtoBox.

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## Abstract Systematic measurements of the in‐plane and out‐of‐plane in conductivity fluctuations have been used to investigate the role of the cerium ion on the splitting of the pairing transition. This splitting, associated with a phase separation, was firstly observed in single crystals and polycrystalline samples of Y~1–__x__~Pr~__x__~Ba~2~Cu~3~O~7–__δ__~. Considering that Ce is the rare‐earth element most easily ionized to the +4 state and that in melt‐textured sample, it is possible to observe anisotropic effects, we examined the effect of this ion in the Y~1–__x__~Ce~__x__~Ba~2~Cu~3~O~7–__δ__~ compound. We prepared three different samples: polycrystalline, pure melt‐textured and Ce‐doped melt‐textured. Melt‐textured samples were prepared using the top‐seeding growth technique and the polycrystalline sample by the standard solid‐state reaction technique. The samples were characterized by X‐ray diffraction, scanning electron microscopy (SEM) and electrical resistivity. To identify power‐law divergences in the conductivity, the results were analyzed in terms of the temperature derivative of the resistivity (${\rm d}\rho /{\rm d}T$) and of the logarithmic temperature derivative

Who reads Fluctuation-induced conductivity of (YCe)Ba2Cu3O7–δ superconductor?

Author

Talita Rosas Ferreira; Lincoln Brum de Leite Gusmão Pinheiro; Pedro Rodrigues Júnior; Francisco Carlos Serbena; Alcione Roberto Jurelo

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 0370-1972)

Published

2011

Language

EN

Field

Physics and Astronomy (Physical Sciences)