Direct measurement of Ni incorporation into Fe(3)O(4)(001)

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)R45° surface as a function of temperature. Two primary surface region sites are identified: a bulk-continuation tetrahedral site an...

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Detalles Bibliográficos
Autores principales: 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.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2018
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6011209/
https://www.ncbi.nlm.nih.gov/pubmed/29882949
http://dx.doi.org/10.1039/c8cp02516a
Descripción
Sumario: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)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 (√2 × √2)R45° reconstruction and is consistent with the preference for octahedral coordination observed in the spinel compound NiFe(2)O(4).

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