Growth of Ba sub 2 YCu sub 3 O sub 7 Single Crystals

Superconductivity onsets in excess of 90K have been found in Ba sub 2 YCU sub 3 O sub 7 and a number of related cuprate perovskites. Recently, high quality single crystals with dimensions approaching 10 X 10 X .1 mm sup 3 useful for a variety of physical property measurements have been grown by a eutectic melt technique.