Synchrotron X-ray powder diffraction study of a pressure-induced phase transition in ferroelectric PbTiO3

被引：0
|
作者：
Levy, D
Sani, A
机构：
[1] Univ Modena & Reggio Emilia, Dipartimento Sci Terra, IT-41100 Modena, Italy
[2] European Synchrotron Radiat Facil, FR-38043 Grenoble, France
来源：
EPDIC 7: EUROPEAN POWDER DIFFRACTION, PTS 1 AND 2 | 2001年 / 378-3卷
关键词：
high pressure; perovskite; phase transition;
D O I：
10.4028/www.scientific.net/MSF.378-381.539
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The structure of PbTiO3 has been refined at different pressures up to 25 GPa by Rietveld synchrotron X-ray powder diffraction. The behavior of the unit cell parameters with pressure shows the presence of a reversible tetragonal to cubic phase transition between 11.4 and 12.1 GPa. The spontaneous strain, related to the spontaneous polarization of ferroelectric materials, z(1/2) =(c/a-1)(1/2), indicates the presence of a second order phase transition, with some order disorder character.
引用
收藏
页码：539 / 544
页数：6
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