The paraelectric-ferroelectric phase transition of Bi4Ti3O12 studied by electron microscopy

被引：7
|
作者：
Nistor, L [1 ]
VanTendeloo, G [1 ]
Amelinckx, S [1 ]
机构：
[1] UNIV ANTWERP,EMAT,B-2020 ANTWERP,BELGIUM
来源：
PHASE TRANSITIONS | 1996年 / 59卷 / 1-3期
关键词：
Aurivillius phase; paraelectric-ferroelectric transition; electron diffraction; high resolution electron microscopy; lone pairs;
D O I：
10.1080/01411599608220041
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The room temperature structure of the Bi4Ti3O12 Aurivillius phase is studied by high resolution electron microscopy. The paraelectric-ferroelectric phase transition is observed in situ by electron diffraction and the high temperature phase is found to be body centered tetragonal, space group I/4mmm. The transition is reversible. An alternative model for the paraelectric-ferroelectric phase transition is proposed. It relates the ordering of the electric dipoles to lone pairs associated with the Bi3+ ions in the perovskite slab of the structure.
引用
收藏
页码：135 / 153
页数：19
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