Preparation of Y-Ba-Cu-O Superconductors with High Critical Current Density by Unidirectional Melt Solidification
- 1 February 1990
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 29 (2A) , L277-279
- https://doi.org/10.1143/jjap.29.l277
Abstract
Y-Ba-Cu-O superconductors with high J c have been prepared by a unidirectional melt solidification method. Uniformly oriented plate-shaped YBa2Cu3O7-y crystals containing small particles of Y2BaCuO5 have been grown successfully using the material with the nominal composition of Y1+x Ba2-x Cu3-2x O z (x≦0.4) as a starting material. The J c values of the unidirectionally solidified Y-Ba-Cu-O samples, measured at 77 K using a four-probe method with continuous direct current, were 4600 and 12000 A/cm2 in 1 and 0.25 T, respectively. These values nearly coincided with those estimated from magnetization hysteresis loops using Bean's critical state model.Keywords
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