Abstract:Systematic conductivity measurements near T C in granular Ag-doped YBa 2 Cu 3 O 7−δ superconductors are presented. Silver doped YBa 2 Cu 3 O 7−δ samples were produced by different routes and characterized by X-ray diffraction, dc magnetization and electrical resistivity. The results were analyzed in terms of the temperature derivative of the resistivity and of the logarithmic temperature derivative of the conductivity, that allowed identifying power-law divergences in the conductivity. The results show that th… Show more
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