Possibility of the investigation of the X-ray diffraction patterns for yttrium ceramic YBa2Cu3Ox having different oxygen stoichiometry on the basis of the mixed-layer crystal model

Details Possibility of the investigation of the X-ray diffraction patterns for yttrium ceramic YBa2Cu3Ox having different oxygen stoichiometry on the basis of the mixed-layer crystal model Possibility of the investigation of the X-ray diffraction patterns for yttrium ceramic YBa2Cu3Ox having different oxygen stoichiometry on the basis of the mixed-layer crystal model

2001-05-07

arxiv.org/abs/cond-mat/0105133v1

Physics

Condensed Matter

Materials Science

2 figures

Scientific paper

In view of the strong anisotropy of oxygen diffusion in high-Tc ceramic YBa2Cu3Ox, it is supposed that a polycrystalline sample of this material can be presented as consisting of crystal grains where each grain was formed by a certain sequence of layers with tetragonal or orthorhombic phase structure. The theory of scattering by mixed-layer crystals was taken as a basis for calculating theoretical X-ray patterns for different sequences of the layers. Some modifications were made in the theory due to crystal structure features of the YBa2Cu3Ox phases. The results obtained agreed quantitatively with data published in many papers and can be used for interpreting the X-ray patterns from ceramics with different oxygen stoichiometry.

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