Analysis of the peak position and linewidth as a function of temperature for the phase transitions in LiKSO4

YURTSEVEN H. H., KURT M.

MODERN PHYSICS LETTERS B, vol.30, no.5, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 30 Issue: 5
  • Publication Date: 2016
  • Doi Number: 10.1142/s0217984916500160
  • Journal Name: MODERN PHYSICS LETTERS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Middle East Technical University Affiliated: Yes

Abstract

Analysis of the peak position and the linewidths of various infrared modes is performed at high (300-850 K) and low (1.5-300 K) temperatures using the experimental data from the literature for LiKSO4 which exhibits a sequence of phase transitions. The temperature dependences of the frequency and the linewidth which are derived from the anharmonic self-energy are fitted to the observed peak positions and the linewidths of the S-O stretching modes (internal nu(3) modes at 1135 cm(-1) and at 1180 cm(-1)), peak position of the S-O bending nu(4) (internal) modes, the peak position and the linewidth of the Li mode at 429 cm(-1) (external mode), and of the infrared band at 363 cm(-1) for LiKSO4.