EN
Using the multiband s-f model we derive the formulae determining the Curie temperature and magnetic moment as functions of concentration x for R^{(1)}_{1-x}R^{(2)}_{x}Al_{2} intermetallic alloys, where R^{1,2} denote magnetic rare earth metals. These formulae, applied to R^{(1)}_{1-x}R^{(2)} alloys (R^{(1)} = La, Lu, Y, Zr and R^{(2)} = Gd) give the linear dependence of the Curie temperature and magnetic moment versus x in full agreement with experimental data.