Correlation between the dynamics of polar nanoregions and temperature evolution of central peaks in Pb[(Zn1/3Nb2/3)0.91Ti0.09]O3 ferroelectric relaxors

被引：36
作者：
Ko, Jae-Hyeon
Kim, Do Han
Kojima, Seiji
机构：
[1] Hallym Univ, Dept Phys, Chunchon 200702, Gangwondo, South Korea
[2] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan
来源：
APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 11期
基金：
新加坡国家研究基金会;
关键词：
D O I：
10.1063/1.2713170
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Acoustic properties of Pb[(Zn1/3Nb2/3)(0.91)Ti-0.09]O-3 have been investigated in a wide temperature range. The sound velocity of acoustic phonons showed a deviation from its high-temperature linear behavior at the Burns temperature T-B similar to 730 K. Upon cooling, acoustic properties exhibited significant changes at about 550 K in polarization state and width of the central peak in addition to changes in frequency and damping of acoustic phonons. This finding suggests that, besides T-B, another intermediate characteristic temperature exists in the evolution of relaxor dynamics, which might be related to the formation of long-lived polar nanoregions and associated local strain fields. (c) 2007 American Institute of Physics.
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