Growth, morphology and thermal properties of Nd1+xBa2-xCu3Oy single crystals

Single crystals of the solid solution Nd1+xBa2-xCu3Oy have been grown in Zr O2/Y crucibles by varying the Cu/Ba ratio of the flux. The amount of Nd on Ba sites changed between 0.028 < x < 0.68. We studied the growth morphology and the peritectic melting temperature as a function of x. We conclude tha t there exist two different solid solution systems, one of 123-type for 0.0 28 < x < 0.30, the other one of 213-type for x > 0.50, and a two-phase regi on for intermediate compositions.