Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Сr-doped bismuth tantalate pyrochlore: Electrical and thermal properties, crystal structure and ESR, NEXAFS, XPS spectroscopy. / Zhuk, N. A.; Sekushin, N. A.; Krzhizhanovskaya, M. G.; Koroleva, A. V.; Reveguk, A. A.; Nekipelov, S. V.; Sivkov, D. V.; Lutoev, V. P.; Makeev, B. A.; Kharton, V. V.; Lebedev, A. M.; Chumakov, R. G.; Koksharova, K. D.; Shpynova, A. D.
в: Materials Research Bulletin, Том 158, 112067, 02.2023.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Сr-doped bismuth tantalate pyrochlore: Electrical and thermal properties, crystal structure and ESR, NEXAFS, XPS spectroscopy
AU - Zhuk, N. A.
AU - Sekushin, N. A.
AU - Krzhizhanovskaya, M. G.
AU - Koroleva, A. V.
AU - Reveguk, A. A.
AU - Nekipelov, S. V.
AU - Sivkov, D. V.
AU - Lutoev, V. P.
AU - Makeev, B. A.
AU - Kharton, V. V.
AU - Lebedev, A. M.
AU - Chumakov, R. G.
AU - Koksharova, K. D.
AU - Shpynova, A. D.
N1 - Publisher Copyright: © 2022 Elsevier Ltd
PY - 2023/2
Y1 - 2023/2
N2 - The Bi1.6Сr0.8Ta1.6O7±Δ pyrochlore was synthesized by the solid-phase method (sp. gr. Fd-3m:2, 10.45523(3) Å, Z = 8). The thermal stability of the pyrochlore in air up to 1140 °C has been established. With increasing temperature (30–1200 °C), the unit cell parameter and the thermal expansion coefficient increase isotropically, although weakly from 10.4413 to 10.5255 Å and 4.6 × 10−6 to 9.2 × 10−6 °C − 1. The electron spin resonance spectrum of the Bi1.6Сr0.8Ta1.6O7±Δ contains an intense Lorentz-shaped band (g∼2.05) with a width of ΔBPP∼160 mT. According to X-ray absorption fine structure and X-ray photoelectron spectroscopy, the ions are in the charge states Bi(+3), Ta(+5-δ), Cr(+3). The sample contains shallow traps with a depth of 0.39 eV and deep traps with an energy of 1.7 eV. At temperatures above 400 °C, ion transfer begins to dominate, which is revealed in a decrease in the conductivity activation energy to 0.78 eV.
AB - The Bi1.6Сr0.8Ta1.6O7±Δ pyrochlore was synthesized by the solid-phase method (sp. gr. Fd-3m:2, 10.45523(3) Å, Z = 8). The thermal stability of the pyrochlore in air up to 1140 °C has been established. With increasing temperature (30–1200 °C), the unit cell parameter and the thermal expansion coefficient increase isotropically, although weakly from 10.4413 to 10.5255 Å and 4.6 × 10−6 to 9.2 × 10−6 °C − 1. The electron spin resonance spectrum of the Bi1.6Сr0.8Ta1.6O7±Δ contains an intense Lorentz-shaped band (g∼2.05) with a width of ΔBPP∼160 mT. According to X-ray absorption fine structure and X-ray photoelectron spectroscopy, the ions are in the charge states Bi(+3), Ta(+5-δ), Cr(+3). The sample contains shallow traps with a depth of 0.39 eV and deep traps with an energy of 1.7 eV. At temperatures above 400 °C, ion transfer begins to dominate, which is revealed in a decrease in the conductivity activation energy to 0.78 eV.
KW - Bismuth tantalate pyrochlore
KW - Chrome doping
KW - Electrical properties
KW - Thermal expansion
KW - XPS and NEXAFS spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85140472809&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/f606c5f4-94f9-3799-8183-a7d76b872a3e/
U2 - 10.1016/j.materresbull.2022.112067
DO - 10.1016/j.materresbull.2022.112067
M3 - Article
AN - SCOPUS:85140472809
VL - 158
JO - Materials Research Bulletin
JF - Materials Research Bulletin
SN - 0025-5408
M1 - 112067
ER -
ID: 100000395