A Raman investigation of the ordered complex perovskite PbMg0.5W0.5O3

被引：23

作者：

Kania, A ^{[1
]}

Jahfel, E ^{[1
]}

Kugel, GE ^{[1
]}

Roleder, K ^{[1
]}

Hafid, M ^{[1
]}

机构：

[1] UNIV METZ & SUPELEC, CLOES, MOPS, F-57078 METZ, FRANCE

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1996年 / 8卷 / 24期

关键词：

D O I：

10.1088/0953-8984/8/24/011

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The complex perovskite PbM(0.5)W(0.5)O(3), exhibiting a long-range B-site cation ordering, has been investigated by Raman scattering from 10 K up to 956 K. The Raman results are systematically treated, and analysed through the characteristic parameters of phonon peaks. The existence of an additional intermediate phase I between the low-temperature antiferroelectric phase A and the high-temperature paraelectric phase P has been demonstrated (T-AI similar or equal to 240 K, T-IP = 312 K). These results were compared with dielectric measurements. The disappearance of the first-order Raman structures near 1000 K in the paraelectric phase is discussed in terms of dynamic disorder in the Ph and O sublattices.

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页码：4441 / 4453

页数：13

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