Study of frequency dependent ε*(ω) in amorphous ferroelectrics:: Modified generalized Langevin equation analysis

被引：6

作者：

Kim, SH ^{[1
]}

Hwang, YH ^{[1
]}

Kim, JA ^{[1
]}

Yang, YS ^{[1
]}

Chae, BG ^{[1
]}

Jang, MS ^{[1
]}

机构：

[1] Pusan Natl Univ, Res Ctr Dielect & Adv Matter Phys, Pusan 609735, South Korea

来源：

JOURNAL OF APPLIED PHYSICS | 1999年 / 85卷 / 01期

关键词：

D O I：

10.1063/1.369454

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We studied the frequency dependent dielectric constants of amorphous LiNbO3, KNbO3, and PbTiO3 at temperatures below the crystallization. We analyzed the real and imaginary part of dielectric constants epsilon'(omega) and epsilon "(omega) using the generalized Langevin equation modified by the space charge effect and the phenomenological frequency scaling. With this model, we can explain the low frequency dispersion and the high frequency relaxation behavior of epsilon'(omega) and epsilon "(omega) simultaneously. Our approach is new and different from our previous equivalent circuit model. (C) 1999 American Institute of Physics. [S0021-8979(99)01301-8].

引用

页码：347 / 351

页数：5

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