A STRUCTURAL MODEL FOR THE RELAXOR PBMG1/3NB2/3O3 AT 5-K

被引：380

作者：

DEMATHAN, N

HUSSON, E

CALVARIN, G

GAVARRI, JR

HEWAT, AW

MORELL, A

机构：

[1] UNIV ORLEANS,ECOLE SUPERIEURE ENERGIE & MAT,PHYS & MECAN MAT LAB,F-45017 ORLEANS,FRANCE

[2] CNRS,CTR RECH PHYS HAUTES TEMP,F-45045 ORLEANS,FRANCE

[3] UNIV TOULON,MAT PROPRIETES VARIABLES LAB,F-83957 LA GARDE,FRANCE

[4] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE

[5] THOMSON CSF,LCR,F-91404 ORSAY,FRANCE

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1991年 / 3卷 / 42期

关键词：

D O I：

10.1088/0953-8984/3/42/011

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The perovskite structure of the relaxor PbMg1/3Nb2/3O3 (PMN) is studied using x-ray and neutron powder diffraction data. The static diffuse scattering (SDS) observed in the diffraction patterns at low temperatures is interpreted using a two-phase Rietveld analysis. The structural model is based on a long-range structure with an average cubic symmetry, and a short-range order due to atomic shifts involved by the formation of polar regions. The two-phase model provides a good improvement in reliability factors. The correlation length and the coexistence of different phases at low temperatures are discussed.

引用

页码：8159 / 8171

页数：13

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