Synthesis and Microstructural Studies of Iron Oxypnictide LaO1-xFxFeAs Superconductors

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dc.creatorShekhar, Chandra
dc.creatorSingh, Sonal
dc.creatorSiwach, P K
dc.creatorSingh, H K
dc.creatorSrivastava, O N
dc.date2008-11-01
dc.date.accessioned2026-07-07T12:05:08Z
dc.date.available2026-07-07T12:05:08Z
dc.descriptionWe report on the synthesis and structural/ microstructural studies of iron based fluorine doped LaOFeAs superconductors. We have successfully synthesized fluorine doped superconducting LaO1-xFxFeAs materials by choosing lower temperature (1150^0C) and longer synthesis duration (60 hours) as compared to the standard values of these employed in the pioneering first contribution [Kamihara et al 2008 J Am Chem Soc 130 3296]. Decrease of lattice parameters as determined by x-ray diffraction confirm the substitution of fluorine. The superconducting transition temperature is 27.5 K which is observed at doping level of x=0.2. This superconducting material LaO1-xFxFeAs exhibits interesting microstructural characteristic. This relates to the existence of another structural phase, besides the standard phase, having c parameters of ~12.67A. This suggests existence of modulated structure, similar to the cuprates, in these new oxypnictides. This phase may have new impacts on this new high-Tc family.
dc.description5 pages, 5 figures. Accepted in Supercod. Sci Technol (2008)
dc.identifierhttps://arxiv.org/abs/0811.0094
dc.identifierhttp://arxiv.org/abs/0811.0094
dc.identifierSupercond. Sci. Technol. 22 (2009) 015005
dc.identifierdoi:10.1088/0953-2048/22/1/015005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/208299
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleSynthesis and Microstructural Studies of Iron Oxypnictide LaO1-xFxFeAs Superconductors
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