Abstract
Abstract Phase diagrams of the Nd2O3-CuO and (Nd. Ce)2O3-CuO systems were investigated by differential thermal analysis. It was found that Nd2CuO4 and Nd2-xCexCuO4 melt incongruently at 1270±5 °C and 1315±5 °C respectively, and the solids of Nd2CuO4 and Nd2-xCexCuO4 exist in equilibrium with the liquid of 79–91 mol% CuO, respectively. On the base of these results, Nd1.86Ce0.14CuO4 single crystals were grown by the traveling solvent, floating zone (TSFZ) method. The as-grown crystals were 5 mm in diameter and 50 mm in length with a lusterless black, and had a few subgrains. The Meissner signal was not observed from the as-grown crystals, but it was observed below 19 K from the crystals annealed in N2 at 900 °C for 70 hours.
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