Abstract
By means of a $d$-band tight-binding Hamiltonian, we calculate the noncollinear distribution of magnetic moments in Fe/Cr superlattices, as a function of the relative orientation $\ensuremath{\Delta}\ensuremath{\phi}$ of the magnetic moments at the center of two adjacent Fe layers. All magnetic moments are computed self-consistently in both magnitude and angle. We find that for thick layers of a Cr spacer, the total energy varies parabolically as a function of $\ensuremath{\Delta}\ensuremath{\phi}$, in accordance with the phenomenological proximity magnetism model proposed by Slonczewski. However, this model is not entirely satisfied for small Cr thicknesses because of the assumptions made in it.
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