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    • Volume 11 Issue 4 December 1988 pp 277-280

      Preparation of single crystals of YBa2Cu3O7−x from nonstoichiometric melts

      N V Chandra Shekar J Suresh K Govinda Rajan G V N Rao

      More Details Abstract Fulltext PDF

      Studies on the single crystal growth of YBa2Cu3O7−x show that the growth conditions have not been optimised yet and they vary in many ways. Here we report the growth of single crystals of YBCO in the size range 0·5–1·2 mm from nonstoichiometric melts. We have made systematic variations in the flux composition (constituting CuO and BaCO3) in order to arrive at an optimum composition for consistently getting single crystals of size 0·5–1·2 mm. The tetragonal phase was confirmed by X-ray diffraction and single crystallinity by the Laue technique. Superconductivity was confirmed in oxygenannealed crystals.

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