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37
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84927336550
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The Lorentzian full width at half maximum (FWHM) is taken to be 2 Γn=2 Γ0+ α Δ E, where 2 Γ0=2.0 eV is the Lorentzian FWHM of the main peak, Δ E is the energy separation from the main peak, and alpha is a constant ( app 0.01). A Gaussian broadening of about 1.6 eV FWHM is also applied.
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40
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84927336549
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At h ν app 100 eV, the Mn 3d to O 2p relative cross section ( app 17%) is larger than that (app 7%) for h ν app 40 eV or that (app 3%) for h ν app 20 eV but is still much smaller than unity. Therefore, the spectra in Fig. 4 are still dominated by emission from O 2p states.
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41
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84927336548
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This empirical factor has been successfully used in previous studies on TM oxides (Refs. 2–4).
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42
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84927336547
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The Lorentzian FWHM of the first peaks of the valence-band and O 1s XAS spectra was fixed to be app 0 eV, and the proportional coefficient for the additional broadening α = 0.001 – 0.005 was assumed. The Gaussian FWHM was taken to be app 1.6 eV.
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43
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84927336546
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Due to the O 1s core-hole potential, the XAS spectra may be distorted from the line shape of the unoccupied density of states. Such an effect is not well understood at present, but will not affect the qualitative features of the spectra and their changes with x as discussed in the present paper.
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44
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0001208774
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(1992)
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, pp. 1561
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Bocquet, A.E.1
Fujimori, A.2
Mizokawa, T.3
Saitoh, T.4
Namatame, H.5
Suga, S.6
Kimizuka, N.7
Takeda, Y.8
Takano, M.9
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49
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33749415529
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(1994)
Phys. Rev. B
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, pp. 14238
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Sarma, D.D.1
Rader, O.2
Kachel, T.3
Chainani, A.4
Mathew, M.5
Holldack, K.6
Gudat, W.7
Eberhardt, W.8
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