Abstract The relationship between anomalous magnetic properties and the atomic ordering process has been studied in the iron-aluminum alloys near the composition of Fe 3Al. The temperature dependence of magnetization for different cooling rates and different magnetizing fields has been determined. The so-called “double Curie point” phenomenon observed first by Sykes and Evans, can be interpreted on the basis of our investigations as due to the appearance of an ordered, initially non-magnetic dispersely distributed phase in the disordered ferromagnetic phase. This mechanism seems to be confirmed also by investigations of other authors. The existence of the Fe 13Al 3 ordered structure first observed by Taylor and Jones with X-ray diffraction methods can be inferred also from the temperature dependence of the magnetization at slow cooling.