Magnetization of disordered cold-worked Fe-Al alloys up to 51 at.% Al

The magnetization and high-field susceptibility of disordered cold-worked Fe 1-c Al c alloys with 0<c<or=0.51 have been determined at 4K in fields up to 150 kOe. The well known initial magnetic behaviour is found to extend to about c approximately=0.25. At higher c values the mean atomic moment decreases faster than a dilution but still has not vanished at c=0.51, while an increasingly strong paramagnetic term simultaneously appears. The experimental results, magnetic moments and susceptibilities, are satisfactorily described in a local environment model, where iron atoms carry a moment only if surrounded by at least eight neighbours. This moment is equal to that of pure iron, 2.2 mu B , for 0