Abstract
Co-doped impurity-free YBa2(Cu1−xCox)3O7−δ(123Cox) with x=0.03 superconducting samples have been synthesized using conventional solid state reaction techniques. A Rietveld analysis of X-ray diffraction data for these specimens reveals that two structures (one tetragonal represented by T-YBCO, and the other orthorhombic represented by O-YBCO) co-exist at this composition of the cuprate. The use of a single tetragonal or single orthorhombic structure as the model for the refinements does not produce acceptable fits to the X-ray diffraction pattern. The refinements show that the T-YBCO phase at 298 K has tetragonal symmetry (P4/mmm) with a=0.387879(4) nm, c=1.17314(1) nm, and that the O-YBCO phase has at 298 K an orthorhombic symmetry (Pmmm) with a=0.387555(4) nm, b=0.389400(4) nm, c=1.17363(1) nm, respectively.
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Wu, X.S., Pan, F.M., Huang, X.R. et al. Two phase co-existence in YBa2(Cu1−xCox)3O7−δ superconductor with x=0.03. JOURNAL OF MATERIALS SCIENCE 31, 6113–6117 (1996). https://doi.org/10.1007/BF00354426
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DOI: https://doi.org/10.1007/BF00354426