Microscopic Investigation of the Coexistence of Superconductivity and Magnetism

Abstract

Mössbauer-effect measurements have been performed on the alloy system ${\mathrm{Eu}}_x{\mathrm{La}}_{1-x}$ showing that for a sample with $x=1.2\%$ there is a transition to a magnetically ordered state at 660 ± 25 mK. The same sample shows a superconducting transition temperature of $T_s=2.15\mathrm{}\left(10\right)\mathrm{}$ K.