Infrared study of the lattice vibrations in LiTaO3

被引：92

作者：

Barker, A. S., Jr. ^{[1
]}

Ballman, A. A. ^{[1
]}

Ditzenberger, J. A. ^{[1
]}

机构：

[1] Bell Tel Labs, Murray Hill, NJ 07974 USA

来源：

PHYSICAL REVIEW B-SOLID STATE | 1970年 / 2卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.2.4233

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Polarized infrared reflectivity measurements have been made on single-crystal LiTaO3 in the frequency range 20 - 10 000 cm(-1) at 300 degrees K. Kramers-Kronig and classical-oscillator dispersion-theory analyses of these data have yielded values for the frequency, strength, and linewidth of the infrared-active transverse optic modes and longitudinal optic modes. Analysis of the far-infrared interference spectrum yields values of 41 and 40 for the ordinary and extraordinary clamped dielectric constants, as well as values for their temperature dependence and dispersion. A calculation is made of the spontaneous polarization in LiTaO3 and LiNbO3 using the x-ray ion displacements.

引用

页码：4233 / 4239

页数：7

共 21 条

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