Iron silicide structure

Iron Silicides Several metastable and stable iron siUcide phases can be epitaxially grown on Si, as described in Sections 14.2 and 14.3. Epitaxial thick films of FeSi(CsCl) exhibit different surface terminations, depending on the preparation conditions. The terminations are associated with characteristic electronic surface states and are obtained on stepwise annealing of an Fe film deposited at room temperature (RDE) to increasingly hi er temperatures. A first, a (1 x 1) structure... 

IRON, Fe (Ar 55 85) - IRON(II) Chemically pure iron is a silver-white, tenacious, and ductile metal. It melts at 1535°C. The commercial metal is rarely pure and usually contains small quantities of carbide, silicide, phosphide, and sulphide of iron, and some graphite. These contaminants play an important role in the strength of iron structures. Iron can be magnetized. Dilute or concentrated hydrochloric acid and dilute sulphuric acid dissolve iron, when iron(II) salts and hydrogen gas are produced. 

Y.-C. Yang et al. (1993) claim that carbon substitution increases both saturation magnetization and magnetocrystalline anisotropy. This conclusion is confirmed by other authors (see table 22). One can see that the silicide carbides of light rare earths exist with a different crystal structure of the BaCdi i -type (I4i/amd space group) in which the carbon atoms fill octahedral vacancies formed by four iron and two lanthanide atoms, with an occupancy of 25%. These compounds exhibit Curie temperatures which are lower than for corresponding the ThMni2-type phases they lie between 390 and 460 K. The mean iron moment amounts to about 1.4 Ub at low temperature (Le Roy et al. 1987). 

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