Temperature Dependence of the Anisotropy in Evaporated Polycrystalline Ni–Fe Films

Abstract

The temperature dependence of the induced anisotropy constant K and saturation magnetization M_s in evaporated polycrystalline Ni–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) = [M_s(T)/M_s(293°K)]^q, where q=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.