RAMAN-SPECTROSCOPIC STUDY OF ORDER-DISORDER IN LEAD MAGNESIUM NIOBATE

被引：77

作者：

IDINK, H

WHITE, WB

机构：

[1] Materials Research Laboratory, Pennsylvania State University, University Park

来源：

JOURNAL OF APPLIED PHYSICS | 1994年 / 76卷 / 03期

关键词：

D O I：

10.1063/1.357697

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Precision Raman spectra have been measured on lead magnesium niobate (PMN)-lead titanate (PT) solid solution at various temperatures. The multiband Raman spectra are inconsistent with Pm3m symmetry but can be accommodated within a model of ordered nanodomains of rhombohedral symmetry. Raman band widths are large and nearly independent of temperature indicating a static structural disorder rather than a dynamic dipolar disorder. Abrupt changes in wave number and widths of certain bending modes at 200 K are interpreted as evidence for a reversible phase transition at this temperature. All of the spectroscopic properties are largely independent of the titanium concentration in the PMN-PT solid solutions.

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页码：1789 / 1793

页数：5

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