Neutron powder diffraction study of the crystal structure of (Ru0.75Cu0.25)(Sr1.47Ba0.2Nd 0.33)(NdCe)Cu2O10-δ

초록

The crystal structure of a Nd-based (Ru0.75Cu0.25)(Sr1.47Ba0.2Nd0.33)(NdCe)Cu2O10-delta compound has been studied by using neutron powder diffraction data collected at 295 K and 65 K. The Rietveld refinements of the data show that the rotation angle of the RuO6 octahedron around the crystallographic c-axis increases and the tilt angle of the RuO6 octahedron decreases upon cooling. The oxygen vacancies were also observed to be located on both the O(1) site of the RuO2 basal plane and the O(4) site of the fluorite-type (Nd,Ce)O2-delta block. The magnetization data showing a paramagnetic behavior are discussed in connection with the refined structural properties of the compound.

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