Determination of magnetic moment vectors distributions in FeCo/Mn superlattices

We present in details a method for determining non-collinear orders in metallic superlattices and the interlayer magnetic couplings between ferromagnetic layers separated by antiferromagnetic spacers. A semiempirical tight binding framework and the real space recursion technique is used to obtain the electronic structure of non-symmetric systems. We focus on the angular self-consistency and we discuss the angular stability of the solutions obtained by fixing the magnetic moment direction of some atoms. We give a few examples of calculations for bulk Mn and FeCo/Mn superlattices and discuss the validity of the results.