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Dielectric Properties of Sr2 +xBi4 −xTi5 −xTaxO18 Ferroceramics

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Bulletin of the Russian Academy of Sciences: Physics Aims and scope


Samples of a new layered Sr2 +xBi4 −xTi5 −xTaxO18 (х = 0–0.8) perovskite are produced using state-of-the-art ceramic technology. Their dielectric properties are studied at frequencies of 25 Hz–1 MHz in a wide range of temperatures. It is established that a region undergoing a ferroelectric phase transition acquires 1/f α-type polarization noise. Analysis of parameter α as a function of temperature reveals a feature at a temperature near the Curie temperature, the value of which depends on the concentration of Ta.

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This work was supported by the Russian Foundation for Basic Research, project no. 18-52-00039-Bel_a.

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Correspondence to N. A. Tolstykh.

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Translated by O. Maslova

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Tolstykh, N.A., Bocharov, A.I., Khakhlenkov, M.V. et al. Dielectric Properties of Sr2 +xBi4 −xTi5 −xTaxO18 Ferroceramics. Bull. Russ. Acad. Sci. Phys. 83, 1107–1109 (2019).

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