Grazing incidence x-ray scattering has been used to study interfacial intermixing in thin films of aluminum/transition metal bilayers grown by dc magnetron sputter deposition at room temperature. As with all transition metals, the ferromagnets Fe, Co and Ni have dramatically different interface widths between X/Al and Al/X (X=Fe,Co,Ni). Intermixing lengths are larger for X on Al than for Al on X.
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Buchanan et al. (2003) studied this question.
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