High-Pressure Effect on PbTiO3: An Investigation by Raman and X-Ray Scattering up to 63 GPa

被引：103

作者：

Janolin, P. -E. ^{[1
]}

Bouvier, P. ^{[2
]}

Kreisel, J. ^{[2
]}

Thomas, P. A. ^{[3
]}

Kornev, I. A. ^{[4
]}

Bellaiche, L. ^{[4
]}

Crichton, W. ^{[5
]}

Hanfland, M. ^{[5
]}

Dkhil, B. ^{[1
]}

机构：

[1] Ecole Cent Paris, Lab Struct Proprietes & Modelisat Solides, CNRS, F-92295 Chatenay Malabry, France

[2] MINATEC, Mat & Genie Phys Lab, CNRS, Grenoble Inst Technol, F-38016 Grenoble, France

[3] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[4] Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA

[5] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 23期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.101.237601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a room-temperature high-pressure x-ray and Raman scattering investigation of lead titanate (PbTiO3) up to 63 GPa. Three continuous phase transitions at 13, 20, and 45 GPa between tetragonal-like phases occur. As a result, no evidence is found for a pressure-induced morphotropic phase boundary. Our study provides experimental evidence that PbTiO3 presents a complex sequence of phases accommodating pressure through mechanisms involving oxygen octahedra tilting and reentrance of ferroelectricity.

引用

页数：4

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