Joint x-ray and neutron refinement of the structure of superconducting YBa2Cu3O7−x: Precision structure, anisotropic thermal parameters, strain, and cation disorder
A. Williams, G. H. Kwei, R. B. Von Dreele, I. D. Raistrick, D. L. Bish
DOI 10.1103/PhysRevB.37.7960 · Physical Review B
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Abstract
X-ray and neutron powder diffraction data for superconducting orthorhombic YBa2Cu3O7−x have been used in a joint refinement to give a room-temperature structure which includes a very precise set of atom positions and thermal-motion parameters. Broadening of the diffraction peaks indicates that these materials are highly strained, and contrary to a number of suggestions in the literature, no evidence is found for any cation disorder.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure not reported | onset |
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