Magnetization of polycrystalline EuS as determined by the pyromagnetic method

Measurements of magnetization of polycrystalline EuS powder are obtained by the pyromagnetic method between 4.2° and 60°K in fixed applied fields ranging from 4 to 14 kOe. For fields sufficient to saturate (H 0≥12kOe), the data, as analyzed by Weiss molecular field theory with a new graphical technique, specify Tc=16.5°±0. 2°K, in good agreement with the specific heat anomaly at 16.2°K. The observed behavior of the approach to saturation suggests a preferred choice of mechanisms for the origin of the large saturation field. © 1965 The American Institute of Physics.