Effect of Lanthanum Substitution on Structure and Modulation in Bi2Sr2-xLaxCaCu2O8+d (0≤x≤0.3) Superconducting Compound
| Autor: | Mohammed Fayçal Mosbah, Azzeddine Beggas, Mourad Mimouni, Mebrouk Ghougali, Soria Zeroual, Mohammed Sadok Mahboub, Ghani Rihia |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Superconductivity Radiation Materials science Substitution (logic) Doping chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Crystallography chemistry Modulation 0103 physical sciences Lanthanum General Materials Science 0210 nano-technology |
| Zdroj: | Defect and Diffusion Forum. 406:240-249 |
| ISSN: | 1662-9507 |
| DOI: | 10.4028/www.scientific.net/ddf.406.240 |
| Popis: | The effect of La substitution on the structure and its modulation in samples with a nominal composition of Bi2Sr2-xLaxCaCu2O8+d where 0≤x≤0.3 superconducting phase was investigated. The X-ray powder diffraction (XRPD) results showed an almost pure Bi-2212 phase, confirmed by the estimated amount of element concentration using dispersive energy X-ray spectroscopy (EDX). Scanning electron microscopy (SEM) micrographs showed a decrease of both crystallite size and connectivity when Lanthanum concentration increases. Le Bail refinement using the Jana2006 program gives a very good value of goodness of fit (GOF) factor. Also, the refinement reveals that for x=0.3 the orthorhombic cell transforms to the tetragonal one and the modulation vector q increases when increasing La concentration. |
| Databáze: | OpenAIRE |
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