Raman Studies of Structural Phase Transitions in Perovskite Ferroelectric Sodium Niobate Solid Solutions

被引：0
|
作者：
Palatnikov, M. [2 ]
Sidorov, N. [2 ]
Jefremov, V. [2 ]
Bormanis, K. [1 ]
Zauls, V. [1 ]
机构：
[1] Univ Latvia, Inst Solid State Phys, Riga, Latvia
[2] RAS, Kola Sci Ctr, Inst Chem, Apatity 184200, Murmansk Region, Russia
来源：
FERROELECTRICS | 2008年 / 367卷
关键词：
Raman spectra; ferroelectrics; phase transitions;
D O I：
10.1080/00150190802365699
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Raman spectra are sensitive to interactions between structural units and, consequently, may reflect fine rearrangements of the units of cation sublattice occuring at compositional changes affecting the phase equlibrium and ferroelectric properties of the crystal. Obtaining Raman spectra show the information on disordering of structural units depending on composition of the cation sublattice in real LixNa1 - xTayNb1 - yO3 ferroelectrics. On the basis of experimental studies shown, that not only the frequency but also intensity of some rigid bands may serve as the function of order parameter of phase transition in Landau's theory of the second order phase transition.
引用
收藏
页码：55 / 60
页数：6
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