Isothermal growth of large YBa2Cu3O7-x single domains up to 93 mm

The growth of YBa2Cu3O7-x, single domains larger than 30-40 mm by a classic al Top Seeding Melt Texturing (TSMT) method appears to be difficult. Becaus e of the very narrow solidification range between the onset of the nucleati on from the seed and the nucleation of grains in the liquid, reaction with the substrate as well as uncontrolled thermal gradients introduce severe li mitations to the growth. After suppressing nucleation from the substrate an d improving the temperature homogeneity around the sample, the growth rate measured in situ was used to carefully adjust the process. A YBa2Cu3O7-x si ngle domain has been grown up to 93 mm without applied thermal gradient nor large overheating. The texture is confirmed on a large volume by neutron s cattering and an homogeneous 211 size distribution and content are found ac ross the sample. This suggests that steady growth conditions have been main tained and that even larger samples could be grown.