RAMAN INVESTIGATION OF UNDOPED, NIOBIUM-DOPED, AND LANTHANUM-DOPED LEAD-ZIRCONATE-TITANATE CERAMICS

被引:27
作者
ELHARRAD, I
BECKER, P
CARABATOSNEDELEC, C
HANDEREK, J
UJMA, Z
DMYTROW, D
机构
[1] UNIV METZ & SUPELEC, CTR LORRAIN OPT & ELECTR SOLIDES, F-57078 METZ 3, FRANCE
[2] SILESIAN UNIV, INST PHYS, PL-40007 KATOWICE, POLAND
关键词
D O I
10.1063/1.359680
中图分类号
O59 [应用物理学];
学科分类号
摘要
In a previous article, we proved and characterized a phase transition of an order-disorder type, below room temperature, in the Pb1-3X/2LaX square(X/2)(Zr0.95Ti0.05)O-3 (X=0.5-4 wt % La) ceramics. In the present article, the analysis of this order-disorder transition is continued on the basis of the comparative study of Raman scattering, as a function of the Nb or La dopant. The parallel analysis and the interpretation of the Raman spectra of the nondoped,,Nb-doped, and La-doped Pb(Zr0.95Ti0.05)O-3 ceramics lead to new information concerning the identification of the vibrational modes involved. In addition, the correlation between the phase transitions and the nature of the dopants is established. New information concerning the cell doubling, during the ferroelectric low temperature to ferroelectric high temperature phase transition, is obtained as well. The Raman study of the lead-lanthanum zirconate-titanate ceramics allowed us to identify for the first time the so-called ''antiferroelectric mode'' and ''ferroelectric mode'' which had been theoretically predicted. (C) 1995 American Institute of Physics.
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收藏
页码:5581 / 5591
页数:11
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