Superconductivity above 50 K in Tb${}_{1-x}$Th${}_x$FeAsO

Lin-jun Li, Yu-ke Li, Zhi Ren +7

We have successfully synthesized one member of LnFeAsO (Ln stands for lanthanides) with Ln=Tb. By partial substitution of Tb${}^{3+}$ by Th${}^{4+}$, superconductivity with onset $T_{c…