Direct measurement of Ni incorporation into Fe3O4(001).
Phys Chem Chem Phys
; 20(24): 16469-16476, 2018 Jun 20.
Article
em En
| MEDLINE
| ID: mdl-29882949
ABSTRACT
The normal incidence X-ray standing wave (NIXSW) technique has been used to follow the evolution of the adsorption geometry of Ni adatoms on the Fe3O4(001)-(â2 × â2)R45° surface as a function of temperature. Two primary surface region sites are identified a bulk-continuation tetrahedral site and a sub-surface octahedral site, the latter site being preferred at higher annealing temperatures. The ease of incorporation is linked to the presence of subsurface cation vacancies in the (â2 × â2)R45° reconstruction and is consistent with the preference for octahedral coordination observed in the spinel compound NiFe2O4.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article