Structure and enhancement of negative thermal expansion in the PbTiO3-CdTiO3 system -: art. no. 231915

被引：44

作者：

Chen, J ^{[1
]}

Xing, XR ^{[1
]}

Yu, RB ^{[1
]}

Liu, GR ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Dept Phys Chem, Beijing 100083, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 23期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2140486

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The structures of Pb1-xCdxTiO3 (x=0.03 and 0.06) were investigated by the x-ray Rietveld method at room temperature. It is surprising to find that the spontaneous polarization displacements of Pb/Cd and Ti atoms according to the oxygen polyhedron decrease, although the c/a ratio increases with doping-cadmium content. Cadmium substitution plays a unique role of enhancement of the negative thermal expansion in PbTiO3. The average bulk thermal expansion coefficient decreases from (a) over bar=-1.99x10(-5)/degrees C for pure PbTiO3 to (a) over bar=-2.40x10(-5)/degrees C for Pb0.94Cd0.06TiO3. The negative thermal expansion of PbTiO3 might be a consequence of hybridization between Pb and O atoms. (c) 2005 Americian Institute of Physics.

引用

页码：1 / 3

页数：3

共 15 条

[1] Thermal expansions of ceramics in the system Pb1-x(La1/2K1/2)xTiO3 [J].

Chen, J ;

Xing, XR ;

Deng, JX ;

Liu, GR .

JOURNAL OF ALLOYS AND COMPOUNDS, 2004, 372 (1-2) :259-266

[2]

CHEN J, 2005, J AM CERAM SOC, V88, P1356

[3] ORIGIN OF FERROELECTRICITY IN PEROVSKITE OXIDES [J].

COHEN, RE .

NATURE, 1992, 358 (6382) :136-138

[4] Phase transitions of Pb(ZrxTi1-x)O3 ceramics -: art. no. 064108 [J].

Frantti, J ;

Ivanov, S ;

Eriksson, S ;

Rundlöf, H ;

Lantto, V ;

Lappalainen, J ;

Kakihana, M .

PHYSICAL REVIEW B, 2002, 66 (06) :641081-6410815

[5] Polarization rotation mechanism for ultrahigh electromechanical response in single-crystal piezoelectrics [J].

Fu, HX ;

Cohen, RE .

NATURE, 2000, 403 (6767) :281-283

[6] Lattice instabilities in (Pb,Cd)TiO3 alloys [J].

Halilov, SV ;

Fornari, M ;

Singh, DJ .

APPLIED PHYSICS LETTERS, 2002, 81 (18) :3443-3445

[7] Evidence for Pb-O covalency in tetragonal PbTiO3 -: art. no. 217601 [J].

Kuroiwa, Y ;

Aoyagi, S ;

Sawada, A ;

Harada, J ;

Nishibori, E ;

Takata, M ;

Sakata, M .

PHYSICAL REVIEW LETTERS, 2001, 87 (21) :217601-1

[8] Diffraction line broadening due to lattice-parameter variations caused by a spatially varying scalar variable:: its orientation dependence caused by locally varying nitrogen content in ε-FeN0.433 [J].

Leineweber, A ;

Mittemeijer, EJ .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2004, 37 :123-135

[9] Tetragonal-to-monoclinic phase transition in a ferroelectric perovskite:: The structure of PbZr0.52Ti0.48O3 [J].

Noheda, B ;

Gonzalo, JA ;

Cross, LE ;

Guo, R ;

Park, SE ;

Cox, DE ;

Shirane, G .

PHYSICAL REVIEW B, 2000, 61 (13) :8687-8695

[10] A PROFILE REFINEMENT METHOD FOR NUCLEAR AND MAGNETIC STRUCTURES [J].

RIETVELD, HM .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1969, 2 :65-&

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