Diffuse x-ray scattering in perovskite ferroelectrics

被引：36

作者：

Chapman, BD

Stern, EA ^{[1
]}

Han, SW

Cross, JO

Seidler, GT

Gavrilyatchenko, V

Vedrinskii, RV

Kraizman, VL

机构：

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

[2] Argonne Natl Lab, Adv Photon Source, Sector 20, PNC,CAT, Argonne, IL 60439 USA

[3] Rostov State Univ, Dept Phys, Rostov Na Donu 344090, Russia

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.71.020102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Diffuse x-ray scattering measurements on the cubic paraelectric phase of single-crystal PbTiO3 are presented. No diffuse scattering sheets are found, in contrast to sheets observed in the cubic paraelectric phases of BaTiO3 and KNbO3. A quantitative analysis of the diffuse scattering indicates that the soft-mode branch contribution to sheets is negligible in all three ferroelectric perovskites. Differences in the diffuse scattering are explained by differences in the disordering of the local displacements, thus resolving a long-standing controversy.

引用

页数：4

共 30 条

[1] DIRECT OBSERVATION OF DISORDER AND CORRELATIONS IN PEROVSKITE-STRUCTURE FERROELECTRICS [J].