Cd hyperfine fields at the bcc Fe/Co interface - art. no. 144427

We present ab initio calculations for the magnetic properties of the (001) and (110) bee Fe/Co interfaces. The calculations are performed by the Korri nga-Kohn-Rostoker Green's-function method using the local-density approxima tion of density-functional theory. Of central interest is the relation betw een the hyperfine fields induced on substitutional Cd probe atoms and the m agnetization profile at the interface. We compare the calculated Cd hyperfi ne fields with the ones measured by a time-differential perturbed angular c orrelation spectroscopic experiment [B. Swinnen, J. Meersschaut, J. Dekoste r, G. Langouche, S. Cottenier, S. Demuynck, and M. Rots, Phys. Rev. Lett. 7 8, 362 (1997)]. The comparison suggests that the considered interfaces betw een Fe and Co are strongly interdiffused, so that no "simplified" relation exists between the measured hyperfine fields and the magnetic moments at th e interface.