Magnetic Properties of Nanocrystalline Co/Ti and Co/Zr Multilayers
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It is shown that the Co sublayers grow in the soft magnetic nanocrystalline phase up to a critical thickness d≈3 and 2.8 nm for Co/Ti and Co/Zr MLs, respectively. The rapid decrease in the interlayer exchange coupling could be explained by its strong damping due to formation of a non-magnetic quasi-amorphous Co-Ti and Co-Zr alloy layer at the interfaces. The nanocrystalline 2.2 nm-Co/2 nm-Ti ML shows a weak 90° coupling near the transition zone from ferromagnetic to zero coupling.
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