High-angle spectra for two Fe/Si multilayers showing the Fe
(011) and (002) peaks. The t Si = 20Å film
is predominantly (011)-textured, while the AF-coupled film
with t Si = 14 Å has mixed (011) and (001)
textures. No x-ray diffraction peaks which could be indexed
to crystalline silicon or silicide spacer layer phases have
been observed in any Fe/Si multilayer. A superlattice
satellite just below the Fe(002) peak is labelled
``-1.''