Phonons in La-Substituted BiFeO3-PbTiO3

被引：0
|
作者：
Mishra, K. K. [1 ]
Sivasubramanian, V. [1 ]
Sarguna, R. M. [1 ]
Ravindran, T. R. [1 ]
Arora, A. K. [1 ]
机构：
[1] Indira Gandhi Ctr Atom Res, Condensed Matter Phys Div, Kalpakkam 603102, Tamil Nadu, India
来源：
INTERNATIONAL CONFERENCE ON PHYSICS OF EMERGING FUNCTIONAL MATERIALS (PEFM-2010) | 2010年 / 1313卷
关键词：
Phonon; Raman spectroscopy; Phase transition; Multiferroics; PBTIO3;
D O I：
暂无
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
(Bi(1-x)La(x))(0.5)Pb(0..5)Fe(0.5)Ti(0.5)O(3) (BF-PT) ceramics were prepared for x = 0.0, 0.2, 0.3, 0.4 and 0.5 using solid state reaction method. x = 0.0 samples were found to have tetragonal perovskite structure, same as that of PbTiO(3) (PT), while in La-substituted samples tetragonal distortion reduced and system turned cubic at 40 % La-concentration. Raman spectroscopic investigations reveal 10 modes in pure BF-PT which were assigned by comparing with those in PT. Although in the cubic phase no Raman active phonons are expected, 7 modes are found that have correspondence with those of the tetragonal phase. The modes in the cubic phase are activated due to substitutional disorder at cation site.
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页码：174 / 176
页数：3
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