Structure of the single ~ phase high . . temperature superconductor YBa a CU 30 7 - 5
نویسنده
چکیده
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 A, b = 3.8864 A, and c = 11.6807 A. The structure consists of "dimpled" Cn02 layers in the a-b planes loosely bonded by one-dimensional fenceIike square-planar cun, chains in the b-c planes.
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