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

DOI: 10.1039/C8CP02516A DOI Help

Authors: P. T. P. Ryan (Diamond Light Source; Imperial College London) , Z. Jakub (Institute of Applied Physics, Technische Universität Wien) , J. Balajka (Institute of Applied Physics, Technische Universität Wien) , J. Hulva (Institute of Applied Physics, Technische Universität Wien) , M. Meier (Institute of Applied Physics, Technische Universität Wien; University of Vienna) , J. T. Kuchle (Diamond Light Source; Technical University of Munich) , P. J. Blowey (Diamond Light Source; University of Warwick) , P. K. Thakur (Diamond Light Source) , C. Franchini (University of Vienna) , D. J. Payne (Imperial College London) , D. P. Woodruff (University of Warwick) , L. A. Rochford (University of Birmingham) , F. Allegretti (Technical University of Munich) , T.-l. Lee (Diamond Light Source) , G. S. Parkinson (Institute of Applied Physics, Technische Universität Wien) , D. A. Duncan (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Chemistry Chemical Physics , VOL 115

State: Published (Approved)
Published: June 2018
Diamond Proposal Number(s): 16403 , 18191 , 13817

Open Access Open Access

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)-(√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 NiFe2O4.

Subject Areas: Chemistry, Physics


Instruments: I09-Surface and Interface Structural Analysis

Documents:
c8cp02516a.pdf