Articles in peer-reviewed journals
|Epitaxy of a mixed-valence Fe-Ce compound on Fe(100)|
|Kierren B., Bertran F., Gourieux T., Krill G.|
|Journal of Physics: Condensed Matter 6 (1994) 4|
|DOI : 10.1088/0953-8984/6/14/004|
The growth mode, electronic structure and structural properties of the Ce/Fe(100) interface have been investigated by Auger spectroscopy, XPS and RHEED experiments. At 650 degrees C, an epitaxial CexFey compound is formed. The surface lattice is of square symmetry, within the limit of experimental error, with a parameter as=4.05+or-0.15 AA. This compound is found to be in a mixed-valence state, with a stoichiometry close to Ce2Fe17. Modifying the detection angle in order to increase surface sensitivity, XPS spectrum analysis shows a gamma -like Ce-enriched surface. At room temperature, Ce grows in a disordered phase without interdiffusion.