Direct measurement of Ni incorporation into Fe3O4(001)
- Ryan, P.T.P.
- Jakub, Z.
- Balajka, J.
- Hulva, J.
- Meier, M.
- K\ufcchle, J.T.
- Blowey, P.J.
- Thakur, P. Kumar
- Franchini, C.
- Payne, D.J.
- Woodruff, D.P.
- Rochford, L.A.
- Allegretti, F.
- Lee, T.-L.
- Parkinson, G.S.
- Duncan, D.A.*
DOIAbstract
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)-( 1a2 7 1a2)R45\ub0 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 ( 1a2 7 1a2)R45\ub0 reconstruction and is consistent with the preference for octahedral coordination observed in the spinel compound NiFe2O4
Add to ORKG