Abstract
Substitution of Pr for Ba in Pr1+xBa2-xCu3O7-δ (x=0.05–0.30) single crystals were successfully controlled by the crystal pulling method. The substitution ratios x of the grown crystal from average composition in the melt of (a) Pr:Ba:Cu=5:24:71, (b) Pr:Ba:Cu=5:28:67, (c) Pr:Ba:Cu=5:30:65 were x=0.05, 0.15 and 0.30 respectively. We proposed a solidification model for this solid solution in the crystal pulling method. If actual tie-line on the ternary equilibrium phase diagram is obtained we could estimate which tie-line is held at the solid/liquid interface by assuming local equilibrium, using diffusion coefficients of each cation in the liquid, and considering mass balance.
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