Character of order-disorder and displacive components in barium titanate

被引：142

作者：

Stern, EA ^{[1
]}

机构：

[1] Univ Washington, Dept Phys, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.93.037601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Reconciling the apparently contradictory results of NMR and x-ray absorption fine structure measurements on the ferroelectric perovskite BaTiO3 gives insight into the character of the displacive and order-disorder components of the phase transitions of this material. The order-disorder component in the transition consists of local atomic displacements from cubic symmetry of constant magnitude that partially lose long-range order, while the displacive component consists of reorientation of these displacements.

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页码：037601 / 1

页数：3

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