Density of states and total energies for the SL with n=10. (a) Total density of states (in black) and project density of states (in gray) for the Cr--3d. (b) Total energies for the non magnetic (NM) and anti-ferromagnetic (AFM) states relative to the ferromagnetic (FM) state. The Fermi level, EF, is set to zero. The dashed lines connecting the points are to guide the eyes.