Direct observation of the B-site cationic order in the ferroelectric relaxor Pb(Mg1/3Ta2/3)O3

被引：15

作者：

Cantoni, M ^{[1
]}

Bharadwaja, SSN ^{[1
]}

Gentil, S ^{[1
]}

Setter, N ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, Fac Engn, Mat Inst,Ceram Lab, CH-1015 Lausanne, Switzerland

来源：

JOURNAL OF APPLIED PHYSICS | 2004年 / 96卷 / 07期

关键词：

D O I：

10.1063/1.1785843

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

By means of transmission electron microscopy (TEM) the structure of chemically ordered regions in Zr-doped Pb(Mg1/3Ta2/3)O-3 has been studied. Large coherent ordered domains were obtained by the addition of 5 mol% PbZrO3. The results obtained by conventional, analytical, and high-resolution TEM are consistent with the random-site description of the B-site order, the so-called random-layer model. Image simulations showed that a careful selection of the imaging conditions for high resolution transmission electron microscopy is necessary in order to determine the different B-site occupancies. By comparison of simulated with experimental images it was possible to directly distinguish between the different ordering models. (C) 2004 American Institute of Physics.

引用

页码：3870 / 3875

页数：6

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