We have applied the Extended Energy Loss Fine Structure (EELFS) technique for studying the radial distribution function of iron before and after the formation of a surface carbidic iron layer. The experiment is performed in the reflection mode with a conventional CMA electron analyzer. The energy range scanned is 50-500 eV. The Fourier analysis of the structures measured above the Fe M2,3 edge and the C K edge gives structural information around different absorbing sites on surfaces which lack long range order. The structural results are compared with the local structure of bulk Fe3C measured with the EXAFS technique. We have found that each carbon on the surface is coordinated to six nearest neighbours iron atoms in a trigonal prism coordination as in the crystalline iron carbide. © 1984.
Structural study of iron and carbidic iron by surface extended energy loss spectroscopy
POLIZZI, Stefano;
1984-01-01
Abstract
We have applied the Extended Energy Loss Fine Structure (EELFS) technique for studying the radial distribution function of iron before and after the formation of a surface carbidic iron layer. The experiment is performed in the reflection mode with a conventional CMA electron analyzer. The energy range scanned is 50-500 eV. The Fourier analysis of the structures measured above the Fe M2,3 edge and the C K edge gives structural information around different absorbing sites on surfaces which lack long range order. The structural results are compared with the local structure of bulk Fe3C measured with the EXAFS technique. We have found that each carbon on the surface is coordinated to six nearest neighbours iron atoms in a trigonal prism coordination as in the crystalline iron carbide. © 1984.
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