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

被引:104
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
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.
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页数:4
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