Theoretical study of non-collinear magnetic orders in (FexCo1-x)/Mn-n superlattices

We study the magnetic orders in (FexCo1-x)/Mn-n superlattices for various Fe concentrations (x = 1, 3/4, 1/2, 1/4 and 0) of the ferromagnetic ordered compound with the ab initio Augmented Spherical Wave method for collinear orders and with the tight binding real space recursion method for non-collinear orders. In perfect superlattices, we determine the angular dependence of the interlayer magnetic couplings when the magnetization of two successive ferromagnetic layer is rotated. We analyse these results as a function of the strength of the interfacial coupling and we compare to the dependencies given in the literature.