Dynamics of Central Peaks in the Brillouin Scattering Spectra of Relaxor Ferroelectrics

Abstract:

High-resolution Brillouin scattering technique was applied to study the dynamics of central peaks (CPs) in two relaxor ferroelectric systems, PLZT-x/65/35 ceramics and PMN-33%PT [001] single crystals, respectively. It was found that CPs appear very close to an intermediate temperature, Td, for both type of specimens. The temperature dependence of CPs was attributed to the appearance and subsequent growth of polar nanoregions (PNRs) intrinsic to relaxor materials.

• Periodical: Key Engineering Materials (Volumes 421-422)
• Pages: 403-406
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.421-422.403
• Online since: December 2009
• Authors: Ghulam Shabbir, Seiji Kojima
• Keywords: Central Peaks, PLZT, PMN-PT, Polar Nanoregions, Relaxor Ferroelectric

References

[12] single crystals. SUMMARY In summary central peaks in PLZT-x/65/35 ceramics and PMN-33%PT.

[1] oriented single crystal were studied by the high-resolution Brillouin scattering technique. In PMN-33%PT, the dynamical behavior of CPs was attributed to the presence of PNRs and domain wall movement/alignment. Whereas in PLZT ceramics, CPs resulted from growth and subsequent thermal profile of PNRs. The new intermediate temperature, Td, may be associated to the phenomenon of CPs in relaxor materials. REFERE#CES.

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