The temperature dependence of the induced anisotropy constantKand saturation magnetizationMsin evaporated polycrystalline Ni&sngbnd;Fe films was determined relative to room‐temperature values over a broad alloy range from 100° to 293°K. Within experimental error,K(T)/K(293°K) = [Ms(T)/Ms(293°K)]q, whereq=3.6±0.2 for all compositions. This result suggests that the anisotropy in evaporated films is a single‐ion effect. Further, if the anisotropy can be described by a combination of pair ordering and constraint release, both mechanisms are single‐ion effects.