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Figure 9
(a) X-ray photoelectron spectra of the valence band of all NixFe3−xO4 films and reference spectra for FeO, Fe3O4, NiFe2O4 and NiO. For better comparison the spectra are shifted. The positions labelled (I), (II), (III) and (IV) denote characteristic features of the respective films. The inset shows an enlargement of the low binding energy region close to the Fermi edge. (b) The positions of feature (II) for the different NFO films (blue circles) with the expected peak positions for NiFe2O4 and NiO (dashed lines).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 56| Part 6| December 2023| Pages 1784-1791
https://doi.org/10.1107/S1600576723009287
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