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Mössbauer study of the iron atom state in modified chromium dioxide. / Bondarevskii, S.I.; Eremin, V.V.; Panchuk, V.V.; Semenov, V.G.; Osmolovsky, M.G.
в: Physics of the Solid State, Том 58, № 1, 2016, стр. 76-80.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Mössbauer study of the iron atom state in modified chromium dioxide
AU - Bondarevskii, S.I.
AU - Eremin, V.V.
AU - Panchuk, V.V.
AU - Semenov, V.G.
AU - Osmolovsky, M.G.
PY - 2016
Y1 - 2016
N2 - © 2016, Pleiades Publishing, Ltd. Powders of modified chromium dioxide produced by the hydrothermal method were studied using 57Fe Mössbauer spectroscopy at a temperature of 298 K. The content of the modifier, i.e., 57Fe compound, was varied from 2 to 10 mmol/mol Cr at a Sb content of 2.2 and 10 mmol/mol Cr. It was shown that, independently of concentrations, Fe3+ ions are distributed between three magnetic solid solutions (sextets): based on CrO2 (bulk material and iron-enriched surface layer), based on Cr2O3, and surface β-CrOOH (doublet). In this case, chromium atoms were not substituted in the CrSbO4 nucleation (12 nm in size) phase with an accuracy up to the Mössbauer factor. It was assumed that the powder coercivity, in addition to the size factor, is controlled by the iron concentration in the CrO2 surface layer.
AB - © 2016, Pleiades Publishing, Ltd. Powders of modified chromium dioxide produced by the hydrothermal method were studied using 57Fe Mössbauer spectroscopy at a temperature of 298 K. The content of the modifier, i.e., 57Fe compound, was varied from 2 to 10 mmol/mol Cr at a Sb content of 2.2 and 10 mmol/mol Cr. It was shown that, independently of concentrations, Fe3+ ions are distributed between three magnetic solid solutions (sextets): based on CrO2 (bulk material and iron-enriched surface layer), based on Cr2O3, and surface β-CrOOH (doublet). In this case, chromium atoms were not substituted in the CrSbO4 nucleation (12 nm in size) phase with an accuracy up to the Mössbauer factor. It was assumed that the powder coercivity, in addition to the size factor, is controlled by the iron concentration in the CrO2 surface layer.
U2 - 10.1134/S106378341601008X
DO - 10.1134/S106378341601008X
M3 - Article
VL - 58
SP - 76
EP - 80
JO - Physics of the Solid State
JF - Physics of the Solid State
SN - 1063-7834
IS - 1
ER -
ID: 7926884