Magnetism and superconductivity in Eu(Fe${}_{1-x}$Ni${}_x$)As${}_2$ ($x$ = 0, 0.04)

Ya-Bin Liu, Yi Liu, Wen-He Jiao +2

We report Eu-local-spin magnetism and Ni-doping-induced superconductivity (SC) in a 112-type ferroarsenide system Eu(Fe${}_{1-x}$Ni${}_x$)As${}_2$. The non-doped EuFeAs${}_2$ exhibits tw…