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(Color) (a) TEM image of a particle. (b) EELS spectra acquired at positions and in (a). (c) Map of iron concentration, . (d) Map of oxygen concentration, . (e) Histogram of the value in (d) or (Mn-rich) regions and (Fe-rich) regions.
Series of EELS spectra successively acquired along the arrow depicted in the inset annular dark-field (ADF) STEM image. Scale bar in the inset image: .
(Color) (a) map of a particle. (b) edges from , , and in (a). (c) Correlations between valence state and intensity ratio for edges of Mn oxide reference materials. The intensity ratios in areas , , and are depicted in (c), respectively.
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