Valence state of manganese and iron ions in La1−xAxMnO3 (A = Ca, Sr) and Bi1−xSrxFeO3 systems from Mn2p, Mn3s, Fe2p and Fe3s X-ray photoelectron spectra. Effect of delocalization on Fe3s spectra splitting
A.T. Kozakov
1
,
Andrei Kochur
2
,
K A Googlev
1
,
A.V. Nikolskii
1
,
V.I. Torgashev
3
,
V. G. Trotsenko
3
,
Andrew Bush
4
Publication type: Journal Article
Publication date: 2015-10-01
scimago Q1
wos Q1
SJR: 1.192
CiteScore: 11.8
Impact factor: 6.3
ISSN: 09258388, 18734669
Materials Chemistry
Metals and Alloys
Mechanical Engineering
Mechanics of Materials
Abstract
La 1− x Ca x MnO 3 ( x = 0.5, 0.7, 0.85, 0.95) ceramic samples are synthesized by solid state reaction method. Mn3s and Mn2p X-ray photoelectron spectra (XPS) of La 1− x Ca x MnO 3 , and Fe3s-spectra of Bi 1− x Sr x FeO 3 (0 ≤ x ≤ 1) are measured at room temperature. Both Mn 3+ and Mn 4+ ions are discovered in La 1− x Ca x MnO 3 similarly to the case of Fe 3+ and Fe 4+ found earlier in Bi 1− x Sr x FeO 3 ceramics. Relative Mn 3+ /Mn 4+ contents are determined by fitting measured Mn2p spectra with combinations of Mn2p spectra of compounds containing tri- and quadrivalent Mn ions. Relative portion of Mn 4+ is shown to increase with the increase of x . Fe3s spectrum splitting in Bi 1− x Sr x FeO 3 increases with x in contrast to the Mn3s-spectrum splitting in La 1−x Ca x MnO 3 and La 1− x Sr x MnO 3 . Anomalous behavior of Fe3s splitting is explained in the frame of the model of partly itinerant 3d-electrons by strong effect of 3d electron delocalization on electron correlation interaction in final state of 3s photoabsorption.
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Kozakov A. et al. Valence state of manganese and iron ions in La1−xAxMnO3 (A = Ca, Sr) and Bi1−xSrxFeO3 systems from Mn2p, Mn3s, Fe2p and Fe3s X-ray photoelectron spectra. Effect of delocalization on Fe3s spectra splitting // Journal of Alloys and Compounds. 2015. Vol. 647. pp. 947-955.
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Kozakov A., Kochur A., Googlev K. A., Nikolskii A., Torgashev V., Trotsenko V. G., Bush A. Valence state of manganese and iron ions in La1−xAxMnO3 (A = Ca, Sr) and Bi1−xSrxFeO3 systems from Mn2p, Mn3s, Fe2p and Fe3s X-ray photoelectron spectra. Effect of delocalization on Fe3s spectra splitting // Journal of Alloys and Compounds. 2015. Vol. 647. pp. 947-955.
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TY - JOUR
DO - 10.1016/j.jallcom.2015.06.161
UR - https://doi.org/10.1016/j.jallcom.2015.06.161
TI - Valence state of manganese and iron ions in La1−xAxMnO3 (A = Ca, Sr) and Bi1−xSrxFeO3 systems from Mn2p, Mn3s, Fe2p and Fe3s X-ray photoelectron spectra. Effect of delocalization on Fe3s spectra splitting
T2 - Journal of Alloys and Compounds
AU - Kozakov, A.T.
AU - Kochur, Andrei
AU - Googlev, K A
AU - Nikolskii, A.V.
AU - Torgashev, V.I.
AU - Trotsenko, V. G.
AU - Bush, Andrew
PY - 2015
DA - 2015/10/01
PB - Elsevier
SP - 947-955
VL - 647
SN - 0925-8388
SN - 1873-4669
ER -
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@article{2015_Kozakov,
author = {A.T. Kozakov and Andrei Kochur and K A Googlev and A.V. Nikolskii and V.I. Torgashev and V. G. Trotsenko and Andrew Bush},
title = {Valence state of manganese and iron ions in La1−xAxMnO3 (A = Ca, Sr) and Bi1−xSrxFeO3 systems from Mn2p, Mn3s, Fe2p and Fe3s X-ray photoelectron spectra. Effect of delocalization on Fe3s spectra splitting},
journal = {Journal of Alloys and Compounds},
year = {2015},
volume = {647},
publisher = {Elsevier},
month = {oct},
url = {https://doi.org/10.1016/j.jallcom.2015.06.161},
pages = {947--955},
doi = {10.1016/j.jallcom.2015.06.161}
}