| 摘要 |
PROBLEM TO BE SOLVED: To produce an oxide crystal capable of being used as a substrate, while inhibiting the dissolution of low melting point substances such as metal silver in a solvent, by using a mixture comprising an oxide containing an element constituting the oxide crystal, a halide compound containing an element constituting the oxide crystal and metal silver as the solvent and forming the oxide crystal on a substrate by a solution growth method. SOLUTION: The crystal of an oxide such as YBa2 Cu3 O6+d is produced by a solution growth method. Therein, a mixture comprising an oxide containing at least one kind of cationic element constituting the above oxide crystal, such as a BaO-CuO mixture, a halide compound containing at least one kind of the cationic element constituting the above oxide crystal, such as BaF2 , and metal silver. The solvent preferably contains the halide compound and the metal silver in contents of 0.1-50mol.% and 0.4-11.0mol.%, respectively. The oxide crystal includes a superconductive crystal or a crystal having the same crystal structure as the same, such as a Y123 type crystal structure.
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