Abstract
Abstract The crystal structure of rare earth modified zirconia and the associated oxygen defects were studied by neutron diffraction. A Rietveld analysis of the neutron powder patterns of heat-treated samples of La- and Nd—10 mol% ZrO2 revealed the composition of a major tetragonal phase (space group P42/nmc) and a minor cubic phase (space group Fm3m). The short-range oxygen defects structure was examined by a Fourier filtering technique. A real-space correlation function, obtained from a Fourier transform of the filtered residual diffuse scattering, showed evidence of static, oxygen vacancy-induced atomic displacements along the 〈1 1 1〉 and other directions of the pseudocubic cell.
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