STRUCTURAL REFINEMENT OF [Y0.75Ca0.25]SrBaCu3-x(PO4)xOy

• Autores: González González, Juan Carlos, Landinez Tellez, D. A., Albino Aguiar, J., Bustamante Dominguez, Angel Guillermo
• Formato: artículo
• Fecha de Publicación: 2000
• Institución: Universidad Nacional Mayor de San Marcos
• Repositorio: Revistas - Universidad Nacional Mayor de San Marcos
• Lenguaje: español
• OAI Identifier: oai:ojs.csi.unmsm:article/8605
• Enlace del recurso: https://revistasinvestigacion.unmsm.edu.pe/index.php/fisica/article/view/8605
• Nivel de acceso: acceso abierto
• Materia: synthesis; Rietveld refinement; superconductivity; phosphate; síntesis; refinamiento Rietveld; superconductividad; fosfato.

(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].