Abstract
We calculate in a full self-consistent way the noncollinear distribution of magnetic moments in Fe5/Crn (n=1–6) superlattices by means of a d-band tight-binding model. Self-consistency is obtained on both magnitude and orientation of the moments: only the relative orientation Δφ between the central moments of two adjacent Fe layers is fixed, the other moments being free to orientate. We find that, when Δφ is varied from 0 to 180°, the total energy of the system behaves in accordance with the phenomenological proximity magnetism model proposed by Slonczewski only when the Cr thickness is not too small. For very thin Cr layers (n<2), the behavior is totally different.
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