Superconductivity and magnetism in K-doped EuFe<sub>2</sub>As<sub>2</sub>
Superconductivity and magnetism in K-doped EuFe<sub>2</sub>As<sub>2</sub>
Superconductivity is found in 50% K-doped EuFe(2)As(2) samples below 33 K. Our results from electrical resistivity, magnetic susceptibility and (57)Fe and (151)Eu Mössbauer spectroscopy provide clear evidence that the ordering of the Fe moments observed at 190 K in undoped EuFe(2)As(2) is completely suppressed in our 50% K-doped sample; thus …