Superconducting properties of Fe‐doped YNi2B2C

The effects of Fe substitution for Ni in the intermetallic superconductor YNi2B2C are reported. Samples of nominal composition Y(Ni1−xFex)2B2C with x=0.01, 0.02, 0.05, and 0.1 have been prepared and subsequently characterized by x‐ray diffraction, ac susceptibility, and resistivity/magnetoresistance measurements. A summary of these data is presented, and these are compared and contrasted with both the behavior previously reported for and the conclusions drawn from Fe and Co doping in this system.