RAMAN STUDIES OF THE FERROELECTRIC PHASE-TRANSITIONS IN (CH3NH3)5BI2CL11 (MAPCB) .1. THE INTERNAL VIBRATIONS OF THE METHYLAMMONIUM CATION

被引：15

作者：

CARPENTIER, P ^{[1
]}

LEFEBVRE, J ^{[1
]}

JAKUBAS, R ^{[1
]}

机构：

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

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1992年 / 4卷 / 11期

关键词：

D O I：

10.1088/0953-8984/4/11/023

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The Raman spectra of (CH3NH3)5Bi2Cl11 in the range of internal frequency modes of the (CH3NH3)+ cation (750-1700, 2700-3500 cm-1) have been recorded in the three phases and at room temperature for the partially deuterated (CD3NH3) compound. The CH3 (or CD3) and NH3+ bands of the spectra have been identified and compared with Raman results available for other methylammonium crystals. The temperature dependences of these internal modes were measured in the range 100-360 K and their temperature behaviour has been explained by a model of linear and quadratic pseudospin-phonon interactions.

引用

页码：2985 / 2999

页数：15