Amorphous state of PbTiO3 has been prepared. DTA, optical and electron-microscopic investigations have clarified the crystallization temperature and the devitrification phenomenon. Certain dielectric anomalies were found in the amorphous state. In Raman spectra, low-lying response is found in the amorphous state, and the ferroelectric soft mode is found when it is crystallized.
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Nakamura et al. (1981) studied this question.
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