PHASE-TRANSITION IN (CH3NH3)3BI2BR9 SINGLE-CRYSTAL

被引：24

作者：

IWATA, M

EGUCHI, M

ISHIBASHI, Y

SASAKI, S

SHIMIZU, H

KAWAI, T

SHIMANUKI, S

机构：

[1] GIFU UNIV, DEPT ELECT & COMP ENGN, GIFU 50111, JAPAN

[2] OSAKA WOMENS UNIV, SAKAI, OSAKA 590, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1993年 / 62卷 / 09期

关键词：

(CH3NH3)3BI2BR9; FERROELECTRICITY; FERROELASTICITY; DIELECTRIC CONSTANT; ELASTIC CONSTANT; PHASE TRANSITION; LANDAU CONDITION; LANDAU THEORY;

D O I：

10.1143/JPSJ.62.3315

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The successive phase transitions in (CH3NH3)3Bi2Br9 (MABB) single crystal have been investigated by measuring of dielectric and elastic dispersion and Brillouin and Raman scattering. Softening of the elastic constant c66 and critical slowing down of the order parameter, which belongs to the E(g) representation, have been found in the phase I. No optical soft mode has been observed. The phase transition from the phase I to the phase II has been discussed by the Landau theory.

引用

页码：3315 / 3326

页数：12

共 30 条

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