Abstract
The lattice parameters, the oxygen content, and the electrical and magnetic properties of M x Nd 2− x CuO 4− y ( M = Na and Ce) with the Nd 2CuO 4 structure have been determined by means of X-ray powder diffraction, thermogravimetry, electrical resistivity, and magnetic susceptibility measurements. The oxidation states of Cu were estimated from the measured y values and the nominal composition x, on the basis of charge neutrality. The composition dependence of the lattice parameters is discussed by taking the oxygen content, the ionic radii, and ( Cu + Cu ) into consideration. The formation of holes and electrons on the CuO bond within the basal plane is discussed in terms of the CuO bond length in the structure of the host materials.
Published Version
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