RAMAN-SCATTERING IN FERROELECTRIC (CH3NH3)3BI2BR9 SINGLE-CRYSTALS

被引：19

作者：

MINIEWICZ, A

JAKUBAS, R

ECOLIVET, C

GIRARD, A

机构：

[1] WROCLAW UNIV,INST CHEM,PL-50383 WROCLAW,POLAND

[2] UNIV RENNES 1,MAT CONDENSEE & MAT GRP,CNRS,URA 804,F-35042 RENNES,FRANCE

来源：

JOURNAL OF RAMAN SPECTROSCOPY | 1994年 / 25卷 / 05期

关键词：

D O I：

10.1002/jrs.1250250514

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The Raman spectra of ferroelectric (CH3NH3)3Bi2Br9 single crystals were studied at temperatures from 80 to 300 K and in the wavenumber range 0-300 cm-1. A tentative assignment of the observed bands is proposed. The phase transitions reported at 188, 140 and 101.5 K influence the Raman spectra and the observed changes are discussed in terms of the possible mechanisms involved. The lowest phase transition at 101.5 K is directly connected with instability of the inorganic sublattice.

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页码：371 / 375

页数：5

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