Fish-tail Effect and Irreversibility Field of (Cu,C)Ba${}_2$Ca${}_3$Cu${}_4$O${}_x$-(LiF)${}_y$ superconductor

P. Badica, V. Sandu, G. Aldica +4

Addition of (LiF)${}_{y<0.15}$, and of proper amount of (AgO)${}_{z=0.45-0.8}$ as oxidizing agent, to (Cu,C)Ba${}_2$Ca${}_3$Cu${}_4$O${}_{10+d}$ superconductor is useful to control and s…