Growing of SbO_xS_1-xI crystals and investigation of vibrational spectra in the phase transition region

Abstract

SbOxS1−xI (x = 0−0.5) crystals have been grown from the vapour phase. Reflection spectra of the SbOxS1−xI (x = 0.2) crystals were studied by a modernized Fourier spectrometer at E c. Using an improved Kramers-Kronig technique with two confining spectral limits, the spectra of optical constants and optical functions were calculated. The vibrational frequencies ωL and ωT have been evaluated. The vibrational frequencies of SbOxS1−xI (x = 0.2) chains in different phases have been calculated in the harmonic approximation. The theoretical results are compared with experimental data.