Structural and Phase Transitions in the High Composition Domain of the System (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3

被引：1

作者：

Wang, H. ^{[1
,2
]}

Laval, J. -P. ^{[3
]}

Ehrenberg, H. ^{[1
,4
]}

Fuess, H. ^{[1
]}

Arrii-Clacens, S. ^{[5
]}

Luo, H. ^{[6
]}

Elouadi, B. ^{[7
]}

机构：

[1] Tech Univ Darmstadt, Inst Mat Sci, D-64287 Darmstadt, Germany

[2] CNRS, LAAS, F-31077 Toulouse 4, France

[3] Univ Limoges, Fac Sci, SPCTS, UMR 6638, F-87060 Limoges, France

[4] IFW Dresden, D-01069 Dresden, Germany

[5] Univ Poitiers, LACCO, F-86022 Poitiers, France

[6] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 201800, Peoples R China

[7] Univ La Rochelle, LEACIM, F-17042 La Rochelle, France

来源：

FERROELECTRICS | 2010年 / 400卷

关键词：

SINGLE-CRYSTALS; RAMAN-SPECTROSCOPY; SOFT PHONON; PBTIO3;

D O I：

10.1080/00150193.2010.505857

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Raman scattering, dielectric studies, powder and single crystal X-ray diffraction on 0.6Pb(Mg1/3Nb2/3)O-3-0.4PbTiO(3) (PMN-40PT) and 0.55Pb(Mg1/3Nb2/3) O-3-0.45PbTiO(3) (PMN-45PT) were carried out over a wide temperature range. Dielectric plots of PMN-45PT revealed two phase transitions with a sharp maximum at T-C (paraelectric-ferroelectric transition at 485 K, from cubic to tetragonal with respective space groups Pm-3m and P4mm similar to PMN-40PT) and a second broad Raman shift at around 225 K. The Raman investigations confirmed the existence of phase transitions in PMN-45PT crystals, and the lowest frequency behaves like a soft mode. The appearance of diffuse scattering at room temperature in PMN-45PT suggests a phase distinct from PMN-40PT below T-C. The identification of the symmetry in this temperature region will be further demonstrated.

引用

页码：362 / 371

页数：10

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