Brillouin scattering study of phase transitions in T1Ins2

Laiho R., Levola T., Sardarly R., Allakhverdiev K., Sadikov I., Tağıyev M.

Solid State Communications, vol.63, no.12, pp.1189-1192, 1987 (Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 63 Issue: 12
  • Publication Date: 1987
  • Doi Number: 10.1016/0038-1098(87)91074-x
  • Journal Name: Solid State Communications
  • Journal Indexes: Scopus
  • Page Numbers: pp.1189-1192
  • Azerbaijan State University of Economics (UNEC) Affiliated: Yes

Abstract

The temperature dependence of the elastic coefficients of T1InS2 has been investigated by Brillouin scattering measurements. For longitudinal phonons propagating in the (001) plane the variation of ΔC∼∼(Tc-T) was found below the ferroelectric transition point (Tc=189 K). For propagation perpendicular to the (001) plane (C33 mode) clear anomalies were observed at T=213 K and T=195 K. Between these temperatures the Brillouin peaks show broadening, which is attibuted to a coupling between the acoustic mode and an overdamped mode. © 1987.