Effect of random local crystal fields on the magnetic properties of rare-earth RNi5−xCux compounds

It was experimentally revealed that the concentration variations of the spontaneous magnetization, Curie temperature, and initial susceptibility of RNi5−xCux alloys (R = Pr, Nd, Tb, Er, Y) were different for various R. The obtained results are qualitatively explained in terms of effects of random local crystal fields appearing in the substitutional alloys. [Russian Text Ignored].