Investigation of dielectric anomalies at cryogenic temperatures in (1-x)[Pb(Mg1/3Nb2/3)O3]-xPbTiO3 system

被引：17
作者：
Lente, MH [1 ]
Zanin, AL [1 ]
Andreeta, ERM [1 ]
Santos, IA [1 ]
Garcia, D [1 ]
Eiras, JA [1 ]
机构：
[1] Univ Fed Sao Carlos, Dept Fis, Grp Ceram Ferroeletr, BR-13565670 Sao Paulo, Brazil
来源：
APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 06期
基金：
巴西圣保罗研究基金会;
关键词：
D O I：
10.1063/1.1771807
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Complex electrical permittivity measurements in (1-x)[Pb(Mg1/3Nb2/3)O-3]-xPbTiO(3) ceramics for 0.10less than or equal toxless than or equal to0.40 were performed in the frequency and temperature range from 1 to 100 kHz and from 15 to 600 K, respectively. Unexpected dielectric anomalies, which were frequency dependent, were found at cryogenic temperatures. It was verified that this dielectric behavior is always observed, independent of whether the composition presents a "normal" ferroelectric or a relaxor characteristic. The results were analyzed within the framework of two current models found in the literature. It was concluded that none of the proposed mechanisms uniquely satisfies the experimental results in the composition range investigated here. (C) 2004 American Institute of Physics.
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页码：982 / 984
页数：3
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