Effect of Lanthanum Substitution on Structure and Modulation in Bi2Sr2-xLaxCaCu2O8+d (0≤x≤0.3) Superconducting Compound

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.

• lanthanum substitution
• 2212 phase
• high-temperature superconductors
• crystal structure
• orthorhombic-tetragonal phase transition
• modulation vector
• crystallite size
• phase purity

• Physics of Superconductivity and Magnetism
• Magnetic and transport properties of perovskites and related materials
• Superconducting Materials and Applications
• lanthanum substitution
• 2212 phase
• high-temperature superconductors
• crystal structure
• orthorhombic-tetragonal phase transition
• modulation vector
• crystallite size
• phase purity
• Condensed Matter Physics
• Electronic, Optical and Magnetic Materials
• Biomedical Engineering
• Physics and Astronomy
• Materials Science
• Engineering