The intermetallic compound Co_2MnSi is halfmetallic, but the structure of real samples is often affected by antisite disorder. The influence of disorder on transport properties is examined by ab initio calculations and is found to be more significant in thin Co_2MnSi slabs sandwiched by metallic leads than in the bulk compound.
The complex spin-mixing conductance of epitaxial Cu/Ni/Cu(100) systems is predicted to oscillate as a function of Ni thickness. The oscillation period is explained in terms of spin-resolved Fermi surface properties of bulk nickel. Stability of the oscillations with respect to interface Cu-Ni interdiffusion and to alloying in the Ni film is investigated as well.
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