Phonon interference inBaTiO3: High-pressure Raman study

Sood, A. K. ; Chandrabhas, N. ; Muthu, D. V. S. ; Jayaraman, A. (1995) Phonon interference inBaTiO3: High-pressure Raman study Physical Review B, 51 (14). pp. 8892-8896. ISSN 0163-1829

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Raman experiments have been carried out on single crystals of BaTiO3 as a function of pressure up to 3.5 GPa across the ferroelectric (tetragonal) to paraelectric (cubic) phase transition. The unusual features in the Raman spectra associated with the interference effects due to coupling of the three A1(TO) phonons are studied quantitatively to obtain the pressure dependence of the line shape parameters and the coupling constants. The frequencies of the middle and highest-frequency modes as well as the linewidth of the middle mode show interesting pressure dependence.

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ID Code:113749
Deposited On:23 Apr 2018 11:59
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