Dielectric Properties of Sr2 + x Bi4 − x Ti5 − x Ta x O18 Ferroceramics

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 tra...

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Bibliographic Details
Published inBulletin of the Russian Academy of Sciences. Physics Vol. 83; no. 9; pp. 1107 - 1109
Main Authors Tolstykh, N A, Bocharov, A I, Khakhlenkov, M V, Kamynin, A A
Format Journal Article
LanguageEnglish
Published New York Springer Nature B.V 01.09.2019
Subjects
Curie temperature
Dielectric properties
Ferroelectric materials
Ferroelectricity
Perovskites
Phase transitions
Temperature
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Summary: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.
ISSN:1062-8738
1934-9432
DOI:10.3103/S1062873819090284