Abstract
D.C. magnetization measurements were carried out on YBaCuO prepared by the quench and melt growth (QMG) process using a vibrating sample magnetometer and a SQUID magnetometer below 100 K. It was found that the D.C. magnetization behavior of QMG processed YBaCuO at 4.2 K can be quantitatively explained in terms of Bean‘s critical state model. This sample also can become a strong bulk permanent magnet with an energy product of more than 80 MGOe at 5 K because of its strong pinning force.
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