| Issue |
Europhys. Lett.
Volume 63, Number 3, August 2003
|
|
|---|---|---|
| Page(s) | 388 - 393 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2003-00534-y | |
| Published online | 01 November 2003 | |
Brillouin scattering study of 
-modified lead zirconate titanate relaxor
Institute of Materials Science, University of Tsukuba Tsukuba, Ibaraki 305-8573, Japan
Corresponding author: shabbir@ims.tsukuba.ac.jp
Received:
9
April
2003
Accepted:
2
June
2003
Elastic properties of -modified (
x)(
)
(lead zirconate titanate)
with 
(PLZT 10/65/35) relaxor ferroelectric ceramic were
studied by high-resolution Brillouin scattering technique in a
wide temperature range from 90 to 1033
. The Brillouin
frequency shift (ν) and sound velocity of the acoustic phonon
modes, showed deviation from the high-temperature linear
behaviour and a broad softening on cooling towards the dielectric
maximum temperature 
. The temperature dependence of
the maximum relaxation time was obtained from the
Vögel-Fulcher relationship by combining the Brillouin
scattering and dielectric data. The onset of the acoustic mode
frequency dispersion from paraelectric to the relaxor
ferroelectric state can be explained by the concept of freezing
of the relaxation time spectrum of PLZT at a finite temperature.
PACS: 62.20.Dc – Elasticity, elastic constants / 78.35.+c – Brillouin and Rayleigh scattering; other light scattering / 77.84.Dy – Niobates, titanates, tantalates, PZT ceramics, etc
© EDP Sciences, 2003
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