Abstract
The magnetism of epitaxial fcc Fe films deposited on Co(100) and sandwiched between two Co(100) films was investigated by x-ray magnetic circular dichroism. The dependence of the Fe magnetism on the film thickness is complex and qualitatively similar on Co(100) and in fcc Co/Fe/Co(100) trilayers. The fcc Fe film magnetization presents a pronounced oscillation, suggesting a partial antiferromagnetic ordering in the 5--10 monolayer thickness range. The fcc Fe films mediate an oscillatory, indirect coupling in Co/Fe/Co(100) structures that alternates in correspondence with the changes of the Fe magnetization.
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