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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