Impurity-induced phase transition in quantum paraelectrics

被引：37

作者：

Wang, YG ^{[1
]}

Kleemann, W

Zhong, WL

Zhang, L

机构：

[1] Gerhard Mercator Univ Duisburg, D-47048 Duisburg, Germany

[2] Shandong Univ, Dept Phys, Jinan 250100, Peoples R China

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.57.13343

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The transverse Ising model is applied to LixK1-xTaO3-like quantum paraelectrics using different kinds of pseudospins representing different perovskite unit cells. Impurity-induced paraelectric-ferroelectric phase transitions are found for appropriate parameters. The substitutional ions act as pinning centers in the system. The dependences of the Curie temperature, spontaneous polarization, and dielectric susceptibility on the concentration of the substitutional ions are calculated. The theoretical results are compared with experimental ones and good agreement is obtained.

引用

页码：13343 / 13346

页数：4

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