NMR Study on the Coexistence of Superconductivity and Ferromagnetism in (Ce_1−xGd_x)Ru₂

抄録

NMR of Gd in ferromagnetic (Ce_1−xGd_x)Ru₂ was observed in a region of x≥0.105. The internal field at Gd is −180±10 kOe. The transverse relaxation time depends on x, temperature and external field. Sharp superconducting transition was confirmed for x≤0.105 by ac susceptibility measurement. The intensity of the signal in alloy of x=0.105 at 1.2 K first increases and then decreases with external field, which indicates that the signal comes from superconductor. The results are compatible with the previous results which support the coexistence of superconductivity and ferromagnetism.