Ferroelectricity

Temperature properties of dielectric permittivity and optical properties of a multilayer structure of variozone barium–strontium titanate

L. V. Grigor'ev^ab, A. A. Semenov^b, A. A. Ivanov^b, E. A. Sedykh<sup>a

a</sup> St. Petersburg National Research University of Information Technologies, Mechanics and Optics, St. Petersburg, Russia
^b Saint Petersburg Electrotechnical University "LETI", St. Petersburg, Russia

Abstract: Optical properties and the temperature dependence of the permittivity of a multilayer structure of a variozone ferroelectric barium-strontium titanate deposited on a single-crystal leucosapphire substrate are studied. The results of mathematical modeling and experimental study of the transmission and reflection coefficient of the structure in the spectral range of 300–1100 nm at small angles of light incidence on the surface as well as the temperature dependence of the permittivity in the temperature range 300–400 K are presented.

Keywords: ferroelectric, barium titanate–strontium, a thin film of ferroelectric material, magnetron sputtering, radio photonics.

Received: 10.08.2020
Revised: 10.08.2020
Accepted: 13.09.2020

DOI: 10.21883/FTT.2021.01.50404.168

 English version: Physics of the Solid State, 2021, 63:1, 90–93

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