Effect of atomic magnetic moments on the relative intensity of the L β and L α components in x-ray emission spectra of 3d transition metal oxides

Гребенников, В. И.; Galakhov, V. R.; Finkel'shtein, L. D.; Ovechkina, N. A.; Kurmaev, E.Z.

doi:10.1134/1.1583787

Cited by 20 publications

(18 citation statements)

References 31 publications

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“…In case of 3d metal oxides, the evaluation by using the equation was over estimate the number of 3d electrons. It can be assigned to be due to a charge transfer from ligand oxygen atoms to a 3d transition metal element owing to a core-hole effect in the intermediate state as reported by Grebennikov et al [5,6]. Figure 1.…”

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confidence: 78%

Information of Valence Charge of 3d Transition Metal Elements Observed in L-Emission Spectra

Terauchi

2019

Microsc Microanal

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confidence: 78%

Information of Valence Charge of 3d Transition Metal Elements Observed in L-Emission Spectra

Terauchi

2019

Microsc Microanal

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“…The Ti 2p1/2 (L2-feature) structures are marked by asterisks in Figure 1 (a, c). The L2absorption spectra are characterized by a broad structure that is due to an additional damping channel caused by the L2L3V-Costere -Kronig transition [28], which reduces the life time of L2-holes. Therefore, we will focus on evolution of the 2p3/2-absorption spectra.…”

Section: Titanium 2p X-ray Absorptionmentioning

confidence: 99%

Effect of Fe content on atomic and electronic structure of complex oxides Sr(Ti,Fe)O3−δ

et al. 2017

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We present a study of the electronic and atomic structure of two series of SrTi1-xFexO3-δ (STFO) powders with different Fe content produced by two different methods, spray pyrolysis or modified Pechini synthesis, by means of soft X-ray absorption spectroscopy. Partial substitution of Ti by Fe atoms in SrTiO3 were found to cause asymmetric distortion of TiO6 octahedrons which increases with increasing Fe content that may violate the cubic symmetry of STFO. The presence mainly of Fe 3+ states in octahedral environment at small concentration of Fe atoms along with essentially smaller content of Fe 4+ states in octahedral environment where the latter contribution increases with increasing Fe content was traced. It is found that the modified Pechini method allows to synthesize more stable structures but a tendency of the SrOx formation in the structure prepared by this technique was marked. The spray pyrolysis method gives the structure free of SrO precipitates but the presence of Fe 3+ states in tetrahedral environment with Fe content higher than 50% and even a certain amount of Fe 2+ ions in an octahedral environment at concentrations higher than 75% in the STFO prepared by this method was established. The O1s (K)-absorption spectra point to increase in oxygen vacancy concentration with increasing Fe content. The lowest degree of structure distortions with enough high oxygen vacancy concentration was traced in STFO (x= 0.25 to x = 0.35) produced by modified Pechini synthesis, which makes it mostly appropriate for technical applications, e.g., as gas sensors, oxygen separation membranes or as fuel cell material.

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“…The Co L2,3-and Ba M4,5-absorption spectra of Nb-substituted BSCF samples are shown effect is more pronounced in the Co L3-than in the L2-absorption spectra. It is well known that the L2 absorption spectra is misrepresented by an additional damping channel caused by the L2L3V-Coster-Kronig transition [18], which leads to the shorter life time of L2-holes. We will, therefore, focus on the analysis of the evolution of the Co 2p3/2 -absorption spectra.…”

Section: Resultsmentioning

confidence: 99%

Soft X-ray absorption spectroscopy study of (Ba0.5Sr0.5) (Co0.8Fe0.2)1−хNbхO3−δ with different content of Nb (5%–20%)

Egorova

Scherb

Schumacher

et al. 2015

Journal of Alloys and Compounds

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The mixed electronic ionic conducting materials (Ba0.5Sr0.5)(Co0.8Fe0.2)1-хNbхO3-δ with partial Nb substitution (x: 0.05, 0.10, 0.15, 0.20) for B cations (Co/Fe), synthesized using a solid state reaction method, have been studied by near edge X-ray absorption fine structure (NEXAFS). Co L2,3-absorption spectra of (Ba0.5Sr0.5)(Co0.8Fe0.2)1-хNbхO3-δ (BSCFN) powders were analyzed with purpose to understand the influence of the Nb substitution on the atomic electronic structure of BSCFN. The joint analysis of the Co L2,3-absorption spectra reveals the presence of mixed oxidation states Co 2+ /Co 3+ in all the studied BSCFN structures. It was established that the proportion of oxidation states Co 2+ /Co 3+ and the corresponding coordinations of Co atoms depend on the content of Nb. In the 10% Nb substituted BSCF sample Co atoms mostly occur in the Co 2+ oxidation state and are preferentially characterized by octahedral coordination site. In all other structures Co atoms are rather characterized by Co 2+ /Co 3+ oxidation states and occupy both octahedrally and tetrahedrally coordinated sites.

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Effect of atomic magnetic moments on the relative intensity of the L β and L α components in x-ray emission spectra of 3d transition metal oxides

Cited by 20 publications

References 31 publications

Information of Valence Charge of 3d Transition Metal Elements Observed in L-Emission Spectra

Information of Valence Charge of 3d Transition Metal Elements Observed in L-Emission Spectra

Effect of Fe content on atomic and electronic structure of complex oxides Sr(Ti,Fe)O3−δ

Soft X-ray absorption spectroscopy study of (Ba0.5Sr0.5) (Co0.8Fe0.2)1−хNbхO3−δ with different content of Nb (5%–20%)

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