Raman study of temperature-induced phase transitions in lead hafnate (PbHfO3)

Sharma, Shiv K. ; Jayaraman, A. ; Pal Chowdhury, C. ; Wang, S. Y. (1994) Raman study of temperature-induced phase transitions in lead hafnate (PbHfO3) Journal of Raman Spectroscopy, 25 (5). pp. 331-334. ISSN 0377-0486

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/jrs.125...

Related URL: http://dx.doi.org/10.1002/jrs.1250250508

Abstract

Results of a high-temperature Raman spectroscopic investigation up to 522 K carried out at ambient pressure on an antiferroelectric PbHfO3 multi-domain single crystal are reported. The changes in the Raman spectral features show that temperature-induced phase transitions occur at 435 ± 1 and at 484 ± 1 K. The first transition is possibly to a tetragonal structure and the second is to the cubic perovskite phase. The behavior is consistent with the earlier x-ray study of PbHfO3. No soft mode behavior associated with the transitions was detected in the Raman spectra of PbHfO3. The changes observed in the high-temperature Raman spectra of PbHfO3 are similar to those found in the spectra of isostructural PbZrO3.

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ID Code:13252
Deposited On:11 Nov 2010 07:05
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