“…Among the iron-pnictides, to-date, the electron-doped (O 1−x F x ) iron-arsenides LnFeAsO 1−x F x have the highest T C 's reported. Until now, there have been reports on the phase diagrams of LnFeAsO 1−x F x , Ln=La 1, 10,14,15,16,17 , Ce 2,7 , Nd 18 , and Sm 19,20,21 . Within the phase diagram of CeFeAsO 1−x F x , J. Zhao et al 7 argue for a suppression of the antiferromagnetism (AFM) with doping such that the magnetic order vanishes in close proximity to the superconductivity.…”