Local and long range polar order in the relaxor-ferroelectric compounds PbMg1/3Nb2/3O3 and PbMg0.3Nb0.6Ti0.1O3 -: art. no. 024104

被引:188
作者
Dkhil, B [1 ]
Kiat, JM
Calvarin, G
Baldinozzi, G
Vakhrushev, SB
Suard, E
机构
[1] Ecole Cent Paris, Lab Struct Proprietes & Modelisat Solides, CNRS, UMR 8580, F-92295 Chatenay Malabry, France
[2] CENS, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France
[3] RAS, AF Ioffe Phys Tech Inst, St Petersburg, Russia
[4] ILL Grenoble, F-38402 Grenoble, France
关键词
D O I
10.1103/PhysRevB.65.024104
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Structural evolutions of PMN/PT10% (PbMg0.3Nb0.6Ti0.1O3) and PMN (PbMg1/3Nb2/3O3) are studied and compared using high-resolution x-ray and neutron diffraction. At high temperature, PMN-like diffuse scattering, associated with local disordered shifts, is evidenced by PMN/PT10%. A part of this intensity condenses at T-c= 285 K when PMN/PT10% exhibits a structural phase transition toward a long-range rhombohedral phase, whereas in PMN the polar order remains short ranged. In the ferroelectric phase of PMN/PT10% local [100] displacements of lead are evidenced, and are connected to the observation of diffuse scattering far below T-c. The local symmetry in which oxygen and Ti/Mg/Nb cations are shifted along the [111] direction, but in which the lead atoms are shifted along one of the tetragonal [100] directions is monoclinic. This short-range polar order reconstructs on average a polar rhombohedral symmetry. A global picture for the structural evolution in the PMN/PT compounds is proposed. It is based on competition between rhombohedral and tetragonal polar order, which connects the relaxation properties of PMN and the high piezoelectric response of morphotropic, monoclinic PMN/PT with a high concentration of PT.
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页码:1 / 8
页数:8
相关论文
共 45 条
[1]  
ARNDT H, 1988, FERROELECTRICS, V79, P145
[2]   Finite-temperature properties of Pb(Zr1-xTix)O3 alloys from first principles [J].
Bellaiche, L ;
García, A ;
Vanderbilt, D .
PHYSICAL REVIEW LETTERS, 2000, 84 (23) :5427-5430
[3]  
BERAR JF, 1998, CPD NEWSLETTER, V20, P3
[4]   Experimental evidence for a spontaneous relaxor to ferroelectric phase transition in Pb(Mg1/3Nb2/3)O-3-10% Ti [J].
Bidault, O ;
Licheron, M ;
Husson, E ;
Calvarin, G ;
Morell, A .
SOLID STATE COMMUNICATIONS, 1996, 98 (08) :765-769
[5]   NMR and the spherical random bond-random field model of relaxor ferroelectrics [J].
Blinc, R ;
Dolinsek, J ;
Gregorovic, A ;
Zalar, B ;
Filipic, C ;
Kutnjak, Z ;
Levstik, A ;
Pirc, R .
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2000, 61 (02) :177-183
[6]   Crossover from glassy to inhomogeneous-ferroelectric nonlinear dielectric response in relaxor ferroelectrics [J].
Bobnar, V ;
Kutnjak, Z ;
Pirc, R ;
Blinc, R ;
Levstik, A .
PHYSICAL REVIEW LETTERS, 2000, 84 (25) :5892-5895
[7]   STRUCTURAL STUDY OF PMN CERAMICS BY X-RAY-DIFFRACTION BETWEEN 297-K AND 1023-K [J].
BONNEAU, P ;
GARNIER, P ;
HUSSON, E ;
MORELL, A .
MATERIALS RESEARCH BULLETIN, 1989, 24 (02) :201-206
[8]   X-RAY AND NEUTRON-DIFFRACTION STUDIES OF THE DIFFUSE PHASE-TRANSITION IN PBMG1/3NB2/3O3 CERAMICS [J].
BONNEAU, P ;
GARNIER, P ;
CALVARIN, G ;
HUSSON, E ;
GAVARRI, JR ;
HEWAT, AW ;
MORELL, A .
JOURNAL OF SOLID STATE CHEMISTRY, 1991, 91 (02) :350-361
[9]   PHASE TRANSITIONS IN PbMg1/3 Nb-2/3 O-3 - PbTiO3 SYSTEM [J].
Bunina, Olga ;
Zakharchenko, Irina ;
Yemelyanov, Sergey ;
Timonin, Pavel ;
Sakhnenko, Vladimir .
FERROELECTRICS, 1994, 157 (01) :299-303
[10]  
Calvarin G., 1995, Ferroelectrics, V165, P349, DOI 10.1080/00150199508228315