Investigation of dielectric relaxation processes in Ba2NdFeNb4-xTaxO15 ceramics
Language
en
Article de revue
This item was published in
Ferroelectrics. 2015, vol. 485, n° 1, p. 101-109
Taylor & Francis: STM, Behavioural Science and Public Health Titles
English Abstract
Dielectric response of Ba2NdFeNb4-xTaxO15 (x = 0.3, 0.6 and 2) solid solutions with Tetragonal Tungsten Bronze structure has been investigated by means of broadband dielectric spectroscopy in the frequency range from 20 ...Read more >
Dielectric response of Ba2NdFeNb4-xTaxO15 (x = 0.3, 0.6 and 2) solid solutions with Tetragonal Tungsten Bronze structure has been investigated by means of broadband dielectric spectroscopy in the frequency range from 20 Hz to 37 GHz. Pure Ba2NdFeNb4O15 compound displays ferroelectric behavior. Substitution of Nb5+ by Ta5+ considerably alters dielectric response of this system. Ferroelectric state was observed only for x = 0.3 compound with slightly lowered ferroelectric phase transition temperature. Further increase of x causes formation of relaxor state in these solid solutions and considerably lowers corresponding dielectric permittivity dispersion temperature region.Read less <
English Keywords
Tetragonal tungsten bronze
broadband dielectric spectrosopy
ferroelec trics
ferroelectric relaxor
dielectric relaxation
Origin
Hal imported