Structure of the single-phase high-temperature superconductor YBa2Cu3O7-δ

Beno, M. A.; Soderholm, L.; Capone, D. W.; Hinks, D. G.; Jorgensen, J. D.; Grace, J. D.; Schuller, Ivan K.; Segre, C. U.; Zhang, K.
July 1987
Applied Physics Letters;7/6/1987, Vol. 51 Issue 1, p57
Academic Journal
We have determined the crystal structure of the single-phase stoichiometric high-temperature superconductor in the Y-Ba-Cu-O system using high-resolution neutron powder diffraction. This compound has an orthorhombic structure with space group Pmmm and lattice constants a=3.8231 Å, b=3.8864 Å, and c=11.6807 Å. The structure consists of ‘‘dimpled’’ CuO2 layers in the a-b planes loosely bonded by one-dimensional fencelike square-planar CuO3 chains in the b-c planes.


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