Dielectric properties and high tunability of Ba(Ti0.7Zr0.3)O3 ceramics under dc electric field

被引：172
作者：
Yu, Z [1 ]
Ang, C [1 ]
Guo, R [1 ]
Bhalla, AS [1 ]
机构：
[1] Penn State Univ, Mat Res Lab, University Pk, PA 16802 USA
来源：
APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 07期
关键词：
D O I：
10.1063/1.1498496
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The effect of dc electric field (E) on the dielectric properties of Ba(Ti0.7Zr0.3)O-3 ceramics with an obvious ferroelectric-relaxor behavior (T(m)similar to229 K, 10 kHz) is reported. The dielectric constant is greatly suppressed and a low loss is obtained under dc electric fields (less than or equal to40 kV/cm). The low loss (tan deltasimilar to0.002) and high tunability (similar to45%) were obtained for the Ba(Ti0.7Zr0.3)O-3 ceramics around 300 K, indicating that it is a promising candidate for tunable materials at room temperature. The field dependence of the temperature (T-m) of the dielectric constant maximum follows the DeltaT(m)similar toE(2/3) relation, indicating a second-order phase-transition-like behavior. (C) 2002 American Institute of Physics.
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页码：1285 / 1287
页数：3
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