RAMAN-SPECTRUM IN PBTIO3 REEXAMINED - DYNAMICS OF THE SOFT PHONON AND THE CENTRAL PEAK

被引：159

作者：

FONTANA, MD ^{[1
]}

IDRISSI, H ^{[1
]}

KUGEL, GE ^{[1
]}

WOJCIK, K ^{[1
]}

机构：

[1] SILESIAN UNIV,INST PHYS,PL-40007 KATOWICE,POLAND

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1991年 / 3卷 / 44期

关键词：

D O I：

10.1088/0953-8984/3/44/014

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Light scattering measurements are investigated as a function of temperature from 10 to 900 K in the tetragonal and cubic phases of a PbTiO3 crystal. Phonon frequencies, ionic effective charges, spontaneous polarization and contribution to the dielectric permittivity are deduced from these data. The results show that the soft phonon and relaxation mode are both needed to describe the dynamics of this material.

引用

页码：8695 / 8705

页数：11

共 30 条

[1] LATTICE MODES IN FERROELECTRIC PEROVSKITES - PBTIO3
BURNS, G
SCOTT, BA
[J]. PHYSICAL REVIEW B, 1973, 7 (07): : 3088 - 3101
[2] TEMPERATURE-DEPENDENCE OF THE NUCLEAR-QUADRUPOLE INTERACTIONS AT TI SITES IN FERROELECTRIC PBTIO3 AND IN ILMENITE AND PEROVSKITE CDTIO3 - EVIDENCE FOR ORDER-DISORDER PHENOMENA
CATCHEN, GL
WUKITCH, SJ
SPAAR, DM
BLASZKIEWICZ, M
[J]. PHYSICAL REVIEW B, 1990, 42 (04): : 1885 - 1894
[3] COWLEY RA, 1964, PHYS REV, V134, P1981
[4] DISPLACIVE TO ORDER-DISORDER CROSSOVER IN THE CUBIC-TETRAGONAL PHASE-TRANSITION OF PBTIO3
FONTANA, MD
IDRISSI, H
WOJCIK, K
[J]. EUROPHYSICS LETTERS, 1990, 11 (05): : 419 - 424
[5] THE INTRINSIC CENTRAL PEAK AT THE STRUCTURAL PHASE-TRANSITIONS IN KNBO3
FONTANA, MD
RIDAH, A
KUGEL, GE
CARABATOSNEDELEC, C
[J]. JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1988, 21 (34): : 5853 - 5879
[6] FONTANA MD, 1984, J PHYS C SOLID STATE, V174, P83
[7] FONTANA MD, 1990, PHONONS 89, P1135
[8] FREY RA, 1976, HELV PHYS ACTA, V49, P1
[9] GAVRILYACHENKO VG, 1970, FIZ TVERD TELA, V12, P1203
[10] GERVAIS F, 1983, Z PHYS B CON MAT, V50, P17, DOI 10.1007/BF01307221

← 1 2 3 →