Growth of high temperature superconducting single crystals

Abstract YBa 2−x Sr x Cu 3 O 7−y and YBa 2 Cu 3 O 7 high-T c superconducting single crystal up to 2.5×2×1 mm having orthorhombic lattices and transition temperatures of 84 and 94 K, respectively, have been grown. Conductivity anisotropy has been confirmed. The grown single crystals exhibit superconducting properties even without additional thermal treatment.