Abstract
Based on a comparison of the results of low-temperature magnetic and Mossbauer studies, a model of the magnetic structure of the ground state (T = 0) of ordered (D03 and B2 types) Fe-Al alloys is suggested. The model is based on the dependence of both the magnitude and sign of the local magnetic moment at an Fe atom on the number of Al atoms in its nearest neighborhood. It has been established that in terms of this model at Al concentrations exceeding 25 at. % there are formed magnetic inhomogeneities (regions with a magnetic moment oriented opposite to the total magnetization) on a nanometer scale (2–5 nm in size).
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