Fitting and analyzing the dielectric spectra of Pb(Mg1/3Nb2/3)O3-xPbTiO3 ceramics and single crystals

被引：0
|
作者：
Zong-Lin Yan
Xi Yao
Liang-Ying Zhang
机构：
[1] Tongji University,Functional Materials Research Laboratory
[2] Shijiazhuang Railway Institute,Applied Physics Laboratory
来源：
Journal of Electroceramics | 2008年 / 21卷
关键词：
Relaxor ferroelectrics; Dielectric spectra; PMN-; PT;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The dielectric spectra of Pb(Mg1/3Nb2/3)O3-xPbTiO3(PMN-xPT) ceramics and single crystals with different PbTiO3(PT) content were fitted and analyzed with dual mechanisms model proposed by Cheng et al. Two polarization processes were proposed in this model, one is related to flips of polar regions and the other associates with the breathing behavior of frozen polar regions. The fitted results showed that the weight factors of contribution of dielectric response from the two mechanisms near Tm varied with the different measuring frequency and PT content. These results can explain why the modeling parameters of Tm and ω to Vogel–Fulcher relation show unlike results in different frequency regions.
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页码：275 / 278
页数：3
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