Tl-1223 thick films-a competitor for Y-123 coated conductors?

Tl-1223 thick films were grown on single crystalline LaAlO/sub 3/ substrates by a screen printing method and doped with small amounts of /sup 235/U. The critical current density was measured by dc transport measurements in fields up to 15 T and at temperatures between 30 K and 85 K. Furthermore, the angular dependence of the critical current density and of the irreversibility lines were studied. Excellent texture and very high critical current densities with a weak field dependence were found in the as grown samples. Substantial enhancements of the critical current density and enhanced irreversibility lines are observed after thermal and fast neutron irradiation. The weak field dependence of J/sub c/ is further reduced. The results are compared with YBaCuO coated conductors and Bi-2223 tapes.