Isovalent substitution effects of arsenic on structural and electrical properties of iron-based superconductor NdFeAsO0.8F0.2
作者： Z. Alborzi , V. Daadmehr
DOI: 10.1007/S10948-019-05209-2
关键词: Doping 、 Crystallography 、 Materials science 、 Crystal structure 、 Rietveld refinement 、 Arsenic 、 Molecular geometry 、 Antimony 、 Bond length 、 Iron-based superconductor
摘要: We have studied the isovalent substitution of antimony (Sb) and phosphorus (P) for arsenic (As) in a nominal composition NdFeAs1−xMxO0.8F0.2 (M = Sb P) with x = 0.0, 0.05. All samples were prepared by one-step solid-state reaction method. The structural, electrical, morphological properties characterized through XRD pattern, 4-probe method, SEM, respectively. doping changed lattice parameters, ⍺ β bond angles, Fe-As length crystal structure based on Rietveld refinement patterns samples. microstrain crystalline size Williamson–Hall FeAs4 tetrahedron from regular shape it effected superconducting critical temperature. temperatures attained at 56 K 46 K NdFeAsO0.8F0.2 NdFeAs0.95Sb0.05O0.8F0.2 suppressed NdFeAs0.95P0.05O0.8F0.2, flake type grains was observed SEM pictures
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