Phys. Rev. B 70, 172101 (2004) [4 pages]Behavior of optical phonons near the diffuse phase transition in relaxor ferroelectric PbMg1∕3Ta2∕3O3Received 1 April 2004; published 1 November 2004 Raman scattering in relaxor ferroelectric PbMg1∕3Ta2∕3O3 (PMT) was investigated in the single-crystalline form in the temperature range of 20–295 K. An anomalous temperature dependence of the integrated intensity and the Raman line contours were found at the diffuse phase transition. A correlation between the anomalies in the integrated intensities and the dispersion of the dielectric response was observed. The distortions of Raman lines with decreasing temperature are discussed. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.70.172101
DOI:
10.1103/PhysRevB.70.172101
PACS:
77.80.−e, 61.12.−q
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