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Publication
Journal of Crystal Growth
Paper
Growth and microstructure of superconducting YBa2Cu3Ox single crystals
Abstract
We have developed a technique for growing free-standing, well-formed YBa2Cu3Ox single crystals from melts in the YBa2Cu3Ox-BaCuO2-CuO pseudoternary system. The crystals are rectangular prisms with the samllest dimension parallel to the c-axis of the unit cell. Fine-scale transformation twins are formed during cooling through the tetragonal-to-orthorhombic phase transition. Superconducting transitions of crystals annealed in oxygen (1 atm) at 420°C typically occur at 92 K with a width of 0.2 K. © 1987.