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- W1970691646 abstract "The structural evolution of amorphous ${mathrm{Si}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{Fe}}_{mathit{x}}$ with composition has been investigated. Implanted specimens with iron concentrations below and above x=0.2, where a structural transformation was previously reported for evaporated samples, have been studied by conversion-electron Mossbauer spectroscopy. Applying the model of Miedema and van der Woude for the isomer shift, a consistent description of our results and of those available from the literature (both from ion-implanted and coevaporated specimens) is given, which covers a wide composition range (0.001ensuremath{le}xensuremath{le}0.750). It was concluded that three differentiated regions exist: a silicon-rich one where iron bears a strong covalent character in a continuous random network structure; an intermediate region where the covalent character decreases continuously at the iron sites, which are here proposed to have a local structure like the one existing in the intermetallic compound FeSi; and finally an iron-rich region where covalent effects are absent, supporting a dense-random-packing description of the amorphous structure." @default.
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- W1970691646 date "1991-09-01" @default.
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- W1970691646 title "Structural composition dependence of amorphous silicon-iron prepared by ion implantation and by coevaporation: A Mössbauer study" @default.
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- W1970691646 doi "https://doi.org/10.1103/physrevb.44.4290" @default.
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