Draft version
X-ray Photoelectron Spectroscopy
The films were characterized for elemental composition with X-ray Photoelectron Spectroscopy, using the
Mn2p, Au4d and O1s peaks, as seen in figure 1a,c and d. Due to adventitious carbon it is difficult to assess the
Mn:O stoichiometry which was instead evaluated from Mn2p½ satellite distance and Mn3s,1,2 shown in figure
1b, multiplet splitting. The Au concentration used for denoting the samples are based on total metal basis, so
that 30 % means that Au/(Au+Mn) corresponds to 30 %:
Figure 1: X-ray Photoelectron Spectroscopy for the thin films. Pure MnOx film is shown in black, Au(30%)-MnOx
is shown in blue and Au(50%)-MnOx is shown in red. a) Mn2p. b) Mn3s. c) Au4d. d) O1s.
Domain size estimation from the Scherrer equation
The Scherrer equation relates the size of crystallites, τ, to the broadening (after instrumental line broadening is
subtracted), B, of peaks seen in X-ray Diffraction with the following expression:3
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