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- W2000757875 abstract "The temperature dependence of dielectric properties and electrical conduction of $({mathrm{Sr}}_{1ensuremath{-}1.5x}{mathrm{Bi}}_{x}){mathrm{TiO}}_{3} (0.0133<~x<~0.133)$ was measured from 10 to 800 K. Three sets of oxygen vacancies related dielectric peaks (peaks A, B, and $C)$ were observed. These peaks could be greatly suppressed or eliminated by annealing the samples in an oxidizing atmosphere, and enhanced or recreated by annealing in a reducing atmosphere. The results show that the Maxwell-Wagner polarization is not the main mechanism, and the Skanavi's model also cannot be directly applied. A tentative explanation was suggested. Peak A, observed in the temperature range of 100--350 K with the activation energy for dielectric relaxation ${E}_{mathrm{relaxA}}=0.32--0.49$ eV, is attributed to the coupling effect of the conduction electrons with the motion of the off-centered Bi and Ti ions; the conduction carriers in this temperature range are from the first ionization of oxygen vacancies ${(V}_{o}).$ Peaks B and C are also discussed." @default.
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- W2000757875 date "2000-07-01" @default.
- W2000757875 modified "2023-10-15" @default.
- W2000757875 title "Oxygen-vacancy-related low-frequency dielectric relaxation and electrical conduction in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>B</mml:mi><mml:mi mathvariant=normal>i</mml:mi><mml:mo>:</mml:mo><mml:mi mathvariant=normal>S</mml:mi><mml:mi mathvariant=normal>r</mml:mi><mml:mi mathvariant=normal>T</mml:mi><mml:mi mathvariant=normal>i</mml:mi><mml:mi mathvariant=normal>O</mml:mi></mml:mrow><mml:…" @default.
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- W2000757875 doi "https://doi.org/10.1103/physrevb.62.228" @default.
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