STRUCTURAL REFINEMENT OF [Y0.75Ca0.25]SrBaCu3-x(PO4)xOy
DOI:
https://doi.org/10.15381/rif.v3i01-02.8605Keywords:
synthesis, Rietveld refinement, superconductivity, phosphateAbstract
(PO4)3- doped [Y0.75Ca0.25]SrBaCu3-x(PO4)xOy compounds with 0.00 ≤ x ≤ 0.30 were synthesized using the solid state reaction technique at normal pressure and temperture conditions. The X-ray diffraction patterns show that for x= 0.0 the samples crystallize into an orthorhombic phase, and for other x values the samples presented a tetragonal structure. The Rietveld method was used to refine the lattice constants. The analysis of structure with Rietveld refinement was done using a model that contains one Cu(2) in a four coordination and not in five coordination in the other 123 tetragonal structures. All samples are superconductors as reported previously [1].
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Copyright (c) 2000 Juan Carlos González González, D. A. Landinez Tellez, J. Albino Aguiar, Angel Guillermo Bustamante Dominguez
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