Dynamics of polar clusters in PMN ceramics: Comparison with PMN single crystal

被引：14
|
作者：
Grigalaitis, R.
Banys, J.
Sternberg, A.
Bormanis, K.
Zauls, V.
机构：
[1] Vilnius Univ, Fac Phys, LT-10222 Vilnius, Lithuania
[2] Univ Latvia, Inst Solid State Phys, LV-1063 Riga, Latvia
来源：
FERROELECTRICS | 2006年 / 340卷
关键词：
relaxor ferroelectric; PMN; polar nano regions; distribution of relaxation times;
D O I：
10.1080/00150190600889221
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
dielectric permittivity of PMN ceramics was measured in the frequency range from 20 Hz to 37 GHz. From the frequency dependence of the real and imaginary parts of dielectric permittivity, the distribution of relaxation times f (tau) was calculated. The f (tau) function broadens significantly, and the second maximum appears below the 270 K temperature. The dielectric response and also relaxation time distribution of PMN ceramics was compared with the previous results of PMN single crystal. The results showed that dynamics of polar nano regions in PMN ceramics is suppressed due to the small size of grains in the ceramics.
引用
收藏
页码：147 / 153
页数：7
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