RAMAN-STUDY OF THE STRUCTURAL PHASE-TRANSITION IN THE ORDERED PEROVSKITE PB2MGWO6

被引：48

作者：

BALDINOZZI, G

SCIAU, P

BULOU, A

机构：

[1] ECOLE CENT PARIS,CHIM PHYS SOLIDE LAB,CNRS,URA 453,F-92295 CHATENAY MALABRY,FRANCE

[2] UNIV MAINE,PHYS ETAT CONDENSE LAB,CNRS,URA 807,F-72017 LE MANS,FRANCE

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1995年 / 7卷 / 42期

关键词：

D O I：

10.1088/0953-8984/7/42/008

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Lead magnesium tungstate Pb2MgWO6 undergoes a structural phase transition at about 310 K. This phase transition has been characterized by Raman spectroscopy. The main features of the Raman spectra, collected between 173 and 523 K, are consistent with group theoretical predictions though unexpected weak and broad signals are observed in the high-temperature phase. From the comparison between these results and the structures previously determined, it is concluded that the phase transition has a behaviour intermediate between pure displacive and order-disorder.

引用

页码：8109 / 8117

页数：9