The ferro-paraelectric phase transition of Pb0.6Ba0.4Nb2O6 investigated by Raman scattering

被引：26
作者：
Lima-Silva, JJ
Garcia, D
Mendes, J
Eiras, JA
Ayala, AP
机构：
[1] Univ Fed Ceara, Dept Fis, BR-60455970 Fortaleza, Ceara, Brazil
[2] Univ Fed Sao Carlos, Dept Fis, BR-1356590 Sao Carlos, SP, Brazil
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2004年 / 241卷 / 08期
关键词：
D O I：
10.1002/pssb.200302042
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The temperature dependence of the vibrational modes of lead barium niobate (PbxBa1-xNb2O6), which belongs to the tungsten-bronze family of oxygen octahedra ferroelectrics, were investigated for the first time using the Raman scattering technique. The investigated sample (x = 0.60) exhibits a ferro-paraelectric phase transition in the measured temperature range. Clear evidence of the structural transformation was observed in the temperature dependence of the phonon energy as well as in the linewidth and the integrated intensity of the Raman bands. The Raman bands assignment was discussed in terms of the vibrational modes of the oxygen octahedron. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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页码：2001 / 2006
页数：6
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