Open AccessАкустические аномалии в твердых растворах SrTiO-=SUB=-3-=/SUB=--BiFeO-=SUB=-3-=/SUB=-
Author(s) -
Е. П. Смирнова,
А. В. Сотников,
Н. В. Зайцева,
H. Schmidt
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.01.45296.181
Subject(s) - attenuation , materials science , dielectric , atmospheric temperature range , condensed matter physics , phase diagram , maxima , range (aeronautics) , ultrasonic sensor , phase (matter) , nuclear magnetic resonance , thermodynamics , acoustics , optics , physics , composite material , optoelectronics , art , quantum mechanics , performance art , art history
The results of acoustic investigations of solid solutions SrTiO_3−BiFeO_3 in the temperature range from 100 to 650 K have been presented. The measurements of the velocity and attenuation of the longitudinal ultrasonic mode at a frequency of 10 MHz were carried out by the pulse-echo method. The observed anomalies in velocity and attenuation correlate with the maxima of the dielectric constant in the temperature range of the relaxor state. In addition, the attenuation peaks in the temperature range 400–600 K, which define Burns and T* temperatures, which are characteristic of relaxors, have been identified. The obtained results have allowed the clarifying of the phase diagram of the solid solution system SrTiO_3−BiFeO_3.