Far-infrared and THz spectroscopy of 0.4PMN-0.3PSN-0.3PZN relaxor ferroelectric ceramics

被引：4
|
作者：
Macutkevic, J.
Kamba, S.
Banys, J.
Pashkin, A.
Bormanis, K.
Sternberg, A.
机构：
[1] Vilnius State Univ, Fac Phys, LT-2040 Vilnius, Lithuania
[2] ASCR, Inst Phys, Prague 18221 8, Czech Republic
[3] Latvian State Univ, Inst Solid State Phys, LV-1063 Riga, Latvia
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2007年 / 27卷 / 13-15期
关键词：
sintering; spectroscopy; ferroelectric properties; perovskites; traditional ceramics; SOFT-MODE BEHAVIOR; DIELECTRIC RESPONSE; PBMG1/3NB2/3O3; POLARIZATION; TRANSITION; CRYSTALS; DYNAMICS; PHASE;
D O I：
10.1016/j.jeurceramsoc.2007.02.023
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Temperature dependence of the optic phonons in 0.4PbMg(1/3)Nb(2/3)O(3)-0.3PbSc(1/2)Nb(1/2)O(3)-0.3PbZn(1/3)Nb(2/3)O(3) (0.4PMN-0.3PSN-0.3PZN)ceramics were studied by means of FTIR reflection and THz transmission spectroscopy in the temperature range of -253.15 to 226.85 degrees C. On heating from low temperatures, the A(1) component of the strongly split TO1 mode softens towards the Burns temperature, but the softening ceases near 126.85 degrees C which could be a signature of polar cluster percolation temperature. Surprisingly, the TO2 mode also softens on heating and follows the Cochran law with extrapolated critical temperature close to the melting point. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3713 / 3717
页数：5
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