PHASE-TRANSITION ANALYSIS THROUGH SOFT-PHONON POLARITON BEHAVIOR IN THE TEMPORAL DOMAIN - A1-SYMMETRY INVESTIGATION OF THE PBTIO3 PEROVSKITE

被引：15

作者：

KIEN, DP ^{[1
]}

LOULERGUE, JC ^{[1
]}

ETCHEPARE, J ^{[1
]}

机构：

[1] UNIV METZ & SUPELEC,CTR LORRAIN OPT & ELECTRON SOLIDE,F-57078 METZ,FRANCE

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.47.11027

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the A1-symmetry lowest-frequency phonon behavior of PbTiO3 near the tetragonal-to-cubic phase transition, by a temporal-domain experiment. Study of the soft-phonon-polariton dispersion as a function of wave-vector value, at different temperatures up to T(c) at 493-degrees-C, allowed us to deduce its contribution to the static dielectric constant. Good agreement with measured values of the dielectric constant, which is associated with the nonappearance of a relaxational mode in the temporal response, clearly demonstrate the displacive origin of the transition.

引用

页码：11027 / 11030

页数：4

共 22 条

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