Raman scattering in (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3

被引：67
作者：
Ohwa, H [1 ]
Iwata, M
Orihara, H
Yasuda, N
Ishibashi, Y
机构：
[1] Gifu Univ, Sch Engn, Dept Elect & Elect Engn, Gifu 5011193, Japan
[2] Nagoya Univ, Grad Sch Engn, Dept Appl Phys, Nagoya, Aichi 4648603, Japan
[3] Aichi Shukutoku Univ, Fac Commun, Nagakute, Aichi 4801197, Japan
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2001年 / 70卷 / 10期
关键词：
relaxor; Raman scattering; diffuse phase transition; mixed crystal; PMN;
D O I：
10.1143/JPSJ.70.3149
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Single crystals and ceramics of (1 - x)PMN-xPT were synthesized in the whole concentration range from x = 0 to x = 1, and the temperature-concentration phase diagram of the system was determined from the dielectric measurement. The temperature dependences of the Raman spectra in the mixed crystals were measured. Raman active modes were observed even in the high temperature cubic phase above the ferroelectric transition point up to x = 0.8. With the electron diffraction result that the superlattice reflections could not be observed above the morphotropic phase boundary (x = 0.35) [C. A. Randall, A. S. Bhalla, T. R. Shrout and L. E. Cross: J. Mater. Res. 5 (1990) 829], the present result indicates that the Raman active modes in the high temperature phase cannot be explained by the superstructure with the Fm (3) over bar m symmetry due to the zone folding.
引用
收藏
页码：3149 / 3154
页数：6
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