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Multilayered films composed of iron metal and amorphous carbon have been investigated by Mossbauer spectroscopy. When iron layers are very thin (8 AA and 15 AA), reduced magnetic hyperfine fields with distributions are observed, which indicate that amorphous Fe layers containing carbon atoms are formed. Mossbauer spectra of a sample with 30 AA Fe layers and of an interface-selectively 57 Fe-doped sample indicate that the structure of the major portion of the Fe layer is BCC but amorphous Fe-C alloy layers are formed at BCC-Fe/amorphous-carbon interfaces, the thickness of which is estimated to be about 5 AA.
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Nakayama et al. (1988) studied this question.
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