Abstract
The temperature (295 K < T < 650 K) investigations of the polarized Raman spectra measured for a single-crystal sample of the Pb0.54Ca0.46TiO3 solid solution in the frequency range 10 < ν < 1200 cm−1 have established the existence of at least one specific temperature (T c ≈ 392 K) at which the oscillator parameters of phonon modes exhibit noticeable anomalies. Similar phenomena are observed in solutions with 0.4 < x < 0.5. A sharp increase in the intensity of the spectral lines corresponding to polarization waves at temperatures immediately below T c suggests a transformation of Pb1 −x Ca x TiO3 (0.4 < x < 0.5) into a polar state, which does not exist for x > 0.5.
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Original Russian Text © A.N. Chabanyuk, V.I. Torgashev, Yu.I. Yuzyuk, V.V. Lemanov, P. Simon, 2009, published in Fizika Tverdogo Tela, 2009, Vol. 51, No. 1, pp. 155–163.
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Chabanyuk, A.N., Torgashev, V.I., Yuzyuk, Y.I. et al. Micro-Raman response and phonon oscillator parameters in solid solutions Pb1 − x Ca x TiO3 (0.40 < x < 0.62). Phys. Solid State 51, 165–173 (2009). https://doi.org/10.1134/S1063783409010211
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DOI: https://doi.org/10.1134/S1063783409010211