Valence state of B and Ta cations in the AB1/2Ta1/2O3 ceramics (A = Ca, Sr, Ba, Pb; B = Fe, Sc) from X-ray photoelectron and Mössbauer spectroscopy data
A.T. Kozakov
1
,
Andrei Kochur
2
,
A.V. Nikolskii
1
,
I.P. Raevski
1
,
S. I. Raevskaya
1
,
V. V. Titov
1
,
A. A. Gusev
3
,
V.P Isupov
3
,
G. Li
4
,
I. N. Zakharchenko
1
Publication type: Journal Article
Publication date: 2020-02-01
scimago Q2
wos Q3
SJR: 0.601
CiteScore: 3.6
Impact factor: 1.5
ISSN: 03682048, 18732526
Electronic, Optical and Magnetic Materials
Physical and Theoretical Chemistry
Spectroscopy
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Radiation
Abstract
Valence states of iron and tantalum ions in eight ceramic compounds with а perovskite structure AxByTazO3+σ (A = Pb, Ba, Sr, Ca; B = Fe, Sc) were studied, including the compounds AxFeyTazO3+σ (A = Ba, Sr, Ca) annealed in a reducing atmosphere of CO. In a number of samples, the presence of Fe2+ ions was detected along with Fe3+. Relative fractions of the Fe2+ and Fe3+ ions were obtained by a full-profile fitting of the Fe2p X-ray photoelectron spectra (XPS) by superposition of experimental spectra of Fe2+ and Fe3+ ions, and by the Mossbauer spectroscopy method. The presence of Ta4+ ions along with Ta5+ ions was detected. The samples subjected to high-temperature annealing in the atmosphere of CO contain only Ta4+ ions. A modification of a standard methodology of the XPS determination of elemental compositions is proposed for the cases when the O1s-spectra have high-energy “tails”; it is based on ensuring the electrical neutrality of the samples. Changes in the elemental and ionic composition of the samples reflect the effect of the annealing of samples in a reducing atmosphere of CO.
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Kozakov A. et al. Valence state of B and Ta cations in the AB1/2Ta1/2O3 ceramics (A = Ca, Sr, Ba, Pb; B = Fe, Sc) from X-ray photoelectron and Mössbauer spectroscopy data // Journal of Electron Spectroscopy and Related Phenomena. 2020. Vol. 239. p. 146918.
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Kozakov A., Kochur A., Nikolskii A., Raevski I., Kubrin S. P., Raevskaya S. I., Titov V. V., Gusev A. A., Isupov V., Li G., Zakharchenko I. N. Valence state of B and Ta cations in the AB1/2Ta1/2O3 ceramics (A = Ca, Sr, Ba, Pb; B = Fe, Sc) from X-ray photoelectron and Mössbauer spectroscopy data // Journal of Electron Spectroscopy and Related Phenomena. 2020. Vol. 239. p. 146918.
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TY - JOUR
DO - 10.1016/j.elspec.2019.146918
UR - https://doi.org/10.1016/j.elspec.2019.146918
TI - Valence state of B and Ta cations in the AB1/2Ta1/2O3 ceramics (A = Ca, Sr, Ba, Pb; B = Fe, Sc) from X-ray photoelectron and Mössbauer spectroscopy data
T2 - Journal of Electron Spectroscopy and Related Phenomena
AU - Kozakov, A.T.
AU - Kochur, Andrei
AU - Nikolskii, A.V.
AU - Raevski, I.P.
AU - Kubrin, Stanislav P.
AU - Raevskaya, S. I.
AU - Titov, V. V.
AU - Gusev, A. A.
AU - Isupov, V.P
AU - Li, G.
AU - Zakharchenko, I. N.
PY - 2020
DA - 2020/02/01
PB - Elsevier
SP - 146918
VL - 239
SN - 0368-2048
SN - 1873-2526
ER -
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@article{2020_Kozakov,
author = {A.T. Kozakov and Andrei Kochur and A.V. Nikolskii and I.P. Raevski and Stanislav P. Kubrin and S. I. Raevskaya and V. V. Titov and A. A. Gusev and V.P Isupov and G. Li and I. N. Zakharchenko},
title = {Valence state of B and Ta cations in the AB1/2Ta1/2O3 ceramics (A = Ca, Sr, Ba, Pb; B = Fe, Sc) from X-ray photoelectron and Mössbauer spectroscopy data},
journal = {Journal of Electron Spectroscopy and Related Phenomena},
year = {2020},
volume = {239},
publisher = {Elsevier},
month = {feb},
url = {https://doi.org/10.1016/j.elspec.2019.146918},
pages = {146918},
doi = {10.1016/j.elspec.2019.146918}
}