Modified growth mechanism in directionally solidified YBa/sub 2/Cu/sub 3/O/sub 7/

Minute amounts of CeO/sub 2/ additions have a strong effect on the solidification path, physicochemical parameters and final size distribution of Y/sub 2/BaCuO/sub 5/ (211) precipitates of directionally solidified YBa/sub 2/Cu/sub 3/O/sub 7/ (123). Inductive and transport critical currents density (J/sub c/) measurements indicate a clear increase with CeO/sub 2/ addition.<
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