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High resolution, low wave-number Raman spectra of amorphous PbTiO3 were studied by using Jobin Yvon Ramanor HG-2S. The Results are possibly explained by the existence of the “pressed” cubic-structure-like clusters in the amorphous PbTiO3, inferred from EXAFS and SAXS studies.For understanding low-temperature fluctnations both in amorphous and in crystalline PbTiO3, we have investigated the specific heat and the dielectric constant both at low temperatures.
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Nakamura et al. (1983) studied this question.
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