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РОССИЙСКАЯ АКАДЕМИЯ НАУК УРАЛЬСКОЕ ОТДЕЛЕНИЕ ИНСТИТУТ ХИМИИ TBEPДОГО ТЕЛА |
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| 30.03.2010 |
 
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Fig. 5. Temperature dependence of site 2 isomer shift for La0.4Sr0.6Fe0.8Cr0.2O3−y. The depicted line is a visual aid. Fig. 6. Evolution with temperature of the mean magnetic field for the Fe3+ component in La1−xSrxFe0.8Cr0.2O3−y. Table 1. Parameters obtained from the Mössbauer spectra of La1−xSrxFe0.8Cr0.2O3−y collected at 4.2, 293 and 343 K (only for the x = 0.4 compound).  δ, isomeric shift, relative to α-Fe at 293 K; Table 2. Relative amounts for each iron ion at 4.2 and 293 K, as obtained from the fitting procedures or calculated from the Fe(3+n)+ fraction (see text). a Fe5+ =(1/2)(Fe4+(293 K) − Fe4+(4.2 K)), considering partial iron CD reaction. Table 3. Binding energies, Eb, FWHM values, relative areas (%) and assigned oxidation states for the observed Cr 2p3/2 peaks on the XPS spectra of La1−xSrxFe0.8Cr0.2O3−y phases. Background subtraction method: Shirley.
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Bhf
, mean magnetic hyperfine field; 
, quadrupole shift; Γ, line width; %, relative area. The estimated errors are <0.01 for δ and 
