Effect of Fe substitution in the structure and superconducting properties of the (Y0.8Pr0.2)Ba2Cu4-xFexO8 system
The effects of iron substitutions on the superconducting and structural properties of (Y0.8Pr0.2)Ba(2)Cu(4-x)FexO(8) were studied. As iron concentration increases, the rate,at which T. diminishes with x is the same as for the YBa2Cu4-xFexO8 system, but faster than in the YBa2Cu3-xFexO7-delta system....
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2003 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Sistema de Información de la Facultad de Ciencias, UNAM |
| OAI Identifier: | oai:repositorio.fciencias.unam.mx:11154/1758 |
| Acceso en línea: | http://hdl.handle.net/11154/1758 |
| Access Level: | acceso abierto |
| Palabra clave: | Physics, Applied high-T-c superconductors Y124 and (Y,Pr)124 systems iron substitution T-c degradation Mossbauer spectroscopy Rietveld refinement site occupancy |
| Sumario: | The effects of iron substitutions on the superconducting and structural properties of (Y0.8Pr0.2)Ba(2)Cu(4-x)FexO(8) were studied. As iron concentration increases, the rate,at which T. diminishes with x is the same as for the YBa2Cu4-xFexO8 system, but faster than in the YBa2Cu3-xFexO7-delta system. The Mossbauer spectra of the different samples, together with Rietveld refinements of their corresponding X-ray spectra, indicate that the iron atoms occupy preferably the Cu(1) sites of the double (CuO)(2) chains in fivefold coordination |
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