Phonon anomalies in Pb1-xLax(Zr0.9Ti0.1)O3 ceramics

被引：16

作者：

Buixaderas, E. ^{[1
]}

Gregora, I. ^{[1
]}

Kamba, S. ^{[1
]}

Kuzel, P. ^{[1
]}

Reaney, I. ^{[2
]}

机构：

[1] ASCR, Inst Phys, Prague 18221 8, Czech Republic

[2] Univ Sheffield, Sheffield S1 3JD, S Yorkshire, England

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

ferroelectric ceramics; ferroelectric transitions; infrared spectra; lanthanum; lead compounds; phonons; Raman spectra; soft modes; submillimetre wave spectra; LEAD-ZIRCONATE-TITANATE; PHASES; RANGE;

D O I：

10.1063/1.3077019

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The lattice dynamics of Pb1-xLax(Zr0.9Ti0.1)O-3 (PLZT X/90/10) with X=0, 2, 4, 10% of La was studied by means of Far Infrared, Raman and terahertz spectroscopies in the temperature range of 20-800 K. Infrared active soft phonons with anomalies near the paraelectric-ferroelectric phase transition were found for all the samples. Some Raman active phonons show anomalies similar to 200 K below T-C, due to another phase transition to a ferroelectric state with doubled unit cell. Samples with higher La content (X=4,10) display nonclassical phonon softening described by omega(2)=a(T-T-C)(gamma) with gamma=2/3.

引用

页数：3

共 16 条

[1] LOW-FREQUENCY VIBRATIONAL MODES AND PHASE-TRANSITIONS OF RHOMBOHEDRAL PBTI1-XZRXO3 [J].