Introduction of pinning centers into TlSrCaCuO systems

Abstract

Pinning centers were successfully introduced into the (1223) phase of TlSrCaCuO system using its derivative (Tl/Pb)(Sr/Ba)CaCuO with a nominal composition of (.5/.5)−(1.6/.4)−2−3. The bulk sample showed a strong flux pinning characteristics. The critical current density, Jc, obtained from the magnetization measurement was > 18,000 A/cm 2 at 77K and 1 T. A tape with the Tl-(1223) material in core had an inter-grain (transport) Jc ∼ 500 A/cm 2 at 77K and 5 T.