Superconductivity in sintered-polycristalline PrBa${}_2$Cu${}_3$O${}_{7-\delta }$

F. M. Araujo-Moreira, P. N. Lisboa Filho, S. M. Zanetti +2

Superconductivity in thin films and powders, and in single crystals of Pr-123 has been found by Blackstead et al. and Zou et al., respectively. Nevertheless, up to now it has never…