Volume 8 | Issue - 8
Volume 8 | Issue - 8
Volume 8 | Issue - 8
Volume 8 | Issue - 7
Volume 8 | Issue - 7
The growth of crystals of the high-Tc oxide superconductors has been hampered by the complexities of the materials and the lack of their phase diagrams. The most common crystal growth technique adopted for these oxides is the “flux” method, where the starting materials are dissolved in a melt, which is usually formed by excess of CuO, Bi2O3 or KCl/NaCl mixture. The crystals are produced by slow cooling of the melt. This method, however, suffers from several drawbacks: (1) crystals are contaminated with a crucible material, (2) crystals are difficult to detach from a solidified melt, (3) crystals contain flux inclusions. In most cases these drawbacks can be overcome by the traveling solvent floating zone (TSFZ) method. Moreover, this method is suitable for growing crystals of incongruently melting compounds and has been thus successfully used to grow large crystals of the high-Tc La2SrxCuO4 and Bi2+xSr2–xCan–1CunO2n+4+δ (denoted as 2201 for n = 1, 2212 for n = 2 and 2223 for n = 3) superconductors. In this work we report the growth of large and high quality 2201, 2212 and 2223 crystals as well as their characterization.