Abstract
A new technique is presented for growing YBa 2Cu 3O x single crystals by using multi-layered and sintered pellets, which consist of YBa 2Cu 3O x and a mixture of YBa 8Cu 9O y and YB 8Cu 9F w O z . Free-standing crystals are grown in cavities formed in the pellet. Superconducting transitions of as-grown crystals occur at 91.5 K with a width of 0.4 K. The growth processes are also discussed.
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