Open AccessFeatures of Raman spectra in barium titanate pressed powder
Author(s) -
I. V. Zaytseva,
A. M. Pugachev,
Н. В. Суровцев,
А. С. Крылов
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/699/1/012058
Subject(s) - raman spectroscopy , barium titanate , materials science , hydrostatic pressure , line width , spectral line , hydrostatic equilibrium , phonon , barium , analytical chemistry (journal) , line (geometry) , condensed matter physics , chemistry , optics , ceramic , thermodynamics , composite material , metallurgy , physics , chromatography , quantum mechanics , astronomy , geometry , mathematics
Raman spectra in barium titanate powder under non-hydrostatic pressures are presented. The relationship between the pressure (up to 11 GPa) and the shift and the width of E(TO)-phonon line has been established. It has been found that under the action of uniaxial pressure a new Raman peak arises in the vicinity of 100 cm −1 . It is shown that the Raman shift and width of both peaks increase depending on the applied pressure. These Raman lines broadening may be associated with an increase of the concentration of defect states in the volume of the sample.