Superconductivity in Pr2Ba4Cu7O15-delta with metallic double chains

M. Matsukawa, Y. Yamada

We report superconductivity with $T_{c,onset}$=$\sim$10K in Pr${}_2$Ba${}_4$Cu${}_7$O${}_{15-\delta }$ compound possessing metallic double chains. A reduction treatment on as-sintered samp…