Dipolar defect model for fatigue in ferroelectric perovskites

被引：122

作者：

Pöykkö, S ^{[1
]}

Chadi, DJ ^{[1
]}

机构：

[1] NEC Res Inst, Princeton, NJ 08540 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.83.1231

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A microscopic model for polarization fatigue in ferroelectric perovskites based on dipolar defects formed by the combination of oxygen vacancies and impurity metal ions is presented. The binding energy of an oxygen vacancy to a Pt impurity in PbTiO3 is calculated to be similar to 2.9 eV. The complex is strongly polar, is stabilized by electron capture, and pins the polarization of the surrounding lattice.

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页码：1231 / 1234

页数：4

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