Ch. Choi et al., THE INCREASE OF THE CRITICAL-CURRENT DENSITY OF YBA2CU3O7-Y BY A MODIFIED MELT-TEXTURED-GROWTH METHOD, Physica. C, Superconductivity, 269(3-4), 1996, pp. 306-312
A modified melt-textured-growth (MTG) method which has a relatively lo
w working temperature and short reaction time compared with the conven
tional MTG method has been developed. The number of YBa2Cu3O7-y (123)
nuclei during the initial slow-cooling process has been minimized whic
h leads to the enhancement of the 123 grain growth rate and a better h
omogenized and smaller Y2BaCuO5 (211) particles over the samples. Magn
etization measurement shows that the 123 crystals have a high J(c) and
a good performance in high magnetic fields.