Raman spectroscopy and effective dielectric function in PLZT x/40/60

被引：40

作者：

Buixaderas, E. ^{[1
]}

Gregora, I. ^{[1
]}

Kamba, S. ^{[1
]}

Petzelt, J. ^{[1
]}

Kosec, M. ^{[2
]}

机构：

[1] Acad Sci Czech Republic, Inst Phys, Prague 18221, Czech Republic

[2] Jozef Stefan Inst, Ljubljana 1000, Slovenia

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2008年 / 20卷 / 34期

关键词：

D O I：

10.1088/0953-8984/20/34/345229

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The Raman spectra of the ceramics PLZT x/40/60 have been measured in the temperature range 20-800 K. An assignment of the Raman modes is presented using the results of the effective medium approximation for the IR data. Factor-group analysis is presented for the case of off-site position of cations or unit cell doubling, which allows a higher number of active phonons in the IR and Raman spectra. The presence of Raman-active modes in the cubic phase is associated with local unit cell doubling and symmetry breakdown due to the off-site cations.

引用

页数：10

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