“…This is a reentrant superconductor in which, with decreasing temperature, first a superconducting transition occurs, at T c1 ≈ 8 K, and then at T c2 ≈ 0.7 K, where local Er moments order ferromagnetically, the material becomes normal again. Until now this material was only probed with macroscopic probes, such as thermal studies, resistivity and susceptibility, neutron scattering or tunneling spectroscopy using thing films [1,2,3,13,14,15,16,17,18]. The superconducting properties far from the magnetic transition remain unknown to a large extent.…”