Direct measurement of Ni incorporation into Fe3O4(001)Electronic supplementary information (ESI) available. See DOI: 10.1039/c8cp02516a

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 Fe 3 O 4 (001)-(√2 × √2) R 45° surface as a function of temperature. Two primary surface region sites are identified: a bulk-continuation tetrahedral site...

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Published in:Physical chemistry chemical physics : PCCP 2018-06, Vol.2 (24), p.16469-16476
Main Authors: Ryan, P. T. P, Jakub, Z, Balajka, J, Hulva, J, Meier, M, Küchle, 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
Format: Article
Language:English
Subjects:
Chemistry
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Summary: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 Fe 3 O 4 (001)-(√2 × √2) R 45° 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 (√2 × √2) R 45° reconstruction and is consistent with the preference for octahedral coordination observed in the spinel compound NiFe 2 O 4 . 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 Fe 3 O 4 (001)-(√2 × √2) R 45° surface as a function of temperature.
ISSN:1463-9076
1463-9084
DOI:10.1039/c8cp02516a