Abstract
The structural and electrophysical characteristics of a series of solid solutions of layered perovskite-type oxides Bi7Ti4 + xWxNb1 − 2xO21 (x = 0–0.5) have been investigated. According to X-ray powder dif- fraction data, all the studied compounds are single-phase and have the structure of Aurivillius phases (m = 2.5) with an orthorhombic crystal lattice (space group I2cm, Z = 2). The changes in the tetragonal and orthorhombic distortions of perovskite-like layers in the compounds have been considered depending on their chemical composition. The temperature dependences of the relative permittivity e(T) have been measured. It has been shown that the Curie temperature TC of the perovskite-type oxides Bi7Ti4 + xWxNb1 − 2xO21 (x = 0–0.5) decreases linearly with an increase in the parameter x. The activation energies of charge carriers have been obtained in different temperature ranges. It has been found that there are three temperature regions with very different activation energies due to different natures of charge carriers in the studied compounds.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
