Magnetism of amorphous FeB in the Bennett model

Abstract We investigate magnetic properties of amorphous clusters, containing 10 4 atoms of two kinds: magnetic and nonmagnetic. Atoms are represented as hard spheres. The clusters are obtained with the sequential deposition algorithm. The ratio of radii of two kinds of spheres is chosen as to reproduce the density of FeB amorphous alloy. Then, calculated spectra of the Fe–Fe radial correlation functions also agree with experimental data. The magnetization is obtained within the Ising model. We reproduce the experimental thermal dependence of spontaneous magnetization of Fe 80 B 20 . This gives information on the Slater–Neel curve and allows to calculate the Arrott plots. We observe also a direct proportionality between the paramagnetic spin–spin correlation function and the Slater–Neel curve.