Abstract
Large (up to 5x4x1.5 mm3) single crystals of YBa2Cu3O7-delta with perfect orthorhombic morphology were successfully grown from favourable flux composition in alumina crucibles. The number of nucleation centres was reduced by using smooth inner wall crucibles and a temperature oscillation method. The crystals could be isolated from the CuO flux by tipping the crucible over while remaining in the furnace at 970-degrees-C. By applying a uniaxial stress at the annealing temperature. both macro- and micro-twin domains in the thick crystals could be removed and a single untwinned domain was obtained. The structures of both twin- and single-domain crystals were characterised by means of high resolution electron microscopy. We also report the magnetic property of the as-grown single crystals.
Original language | English |
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Pages (from-to) | 291-300 |
Number of pages | 10 |
Journal | Physica C: Superconductivity |
Volume | 195 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - 1 Jun 1992 |
Keywords
- YBA2CU3O7-X