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The amorphous alloy Fe81B13.5Si3.5C 2 shows an additional induced magnetic anisotropy, as compared with the alloy Fe81.5B 14.5Si4, attributed to a rearrangement of the carbon atoms. These atoms migrate faster than the other components, through a particular mechanism, probably interstitial in character. Their mobility is comparable to that of interstitial carbon in the crystalline iron-nickel alloys.
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Chambron et al. (1982) studied this question.
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