PULSED-FIELD MAGNETIZATION OF MELT-PROCESSED Y-BA-CU-O BULK SUPERCONDUCTOR WITH NO WEAK LINKS

The applied field dependence of magnetic flux trapped by the pulsed fi eld magnetization (PFM) method has been investigated for a small melt- processed Y-Ba-Cu-O bulk sample with a symmetric distribution of the t rapped flux. It was revealed that the magnetic flux trapped in the sam ple decreases when the applied field exceeds a critical value, regardl ess of the existence of weak links, and that the reduction is marked i n the center of the sample. Furthermore, the reduction was found to st rongly depend not only on the PFM condition responsible for the heat g eneration but also on the cooling condition to dissipate the heat gene rated in the sample.