Unusual microstructures of YBa2Cu3Ox (123) crystals have been observed. These structures have been shown to pass very high transport currents. A model of the solidification of 123 from a melt with Y2BaCuO5 (211) inclusions indicates that the stability of the 123 interface can depend on the sizes of the 211 inclusions. The observed formations are interpreted in the light of this instability.
& Svobodny, T.
(1996). Stability Analysis of a Model for the Defect Structure of YBa2Cu3Ox. Physical Review B, 53 (14), 9396-9399.