We present new results on the magnetic properties of constrained, iron base, good quality, single-crystalline superlattices, Fe/Ru and Fe/Ir. It is shown that in the first case there are two magnetically dead layers at the interface while in the second case there is probably none. The magnetic moment of Fe is, in both superlattices, about 1. 7 gb. The magnetic anisotropy are opposite, in plane for Fe/Ru, perpendicular for Fe/Ir.
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