PHYSICAL PROPERTIES OF FERROELECTRIC BI4-xLAxTI3O12 NANO-PARTICLES SYNTHESIZED BY THE CHEMICAL CO-PRECIPITATION METHOD

被引：2
|
作者：
Islam, M. S. [1 ]
Kano, J. [1 ]
Shikanai, F. [1 ]
Kojima, S. [1 ]
机构：
[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058573, Japan
来源：
INTEGRATED FERROELECTRICS | 2008年 / 100卷
关键词：
layered ferroelectrics; nano-particles; soft mode;
D O I：
10.1080/10584580802540942
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Bi4 - xLaxTi3O12 (BLT) nano-particles have been synthesised by the chemical co-precipitation method utilizing a polymeric precursor. The particle size decreases from 100 to 40 nm with the increase of La content (x = 0 1) owing to the increase of a reaction temperature. The axial ratio a/b of BLT decreases with the increase of La content reflects a relaxation of structural distortion from its ideal tetragonal structure. A monoclinic to orthorhombic transition occurs at La 0.75. The existence of the soft mode in Raman spectra above x = 0.75 demonstrates a displacive nature of orthorhombic to tetragonal phase transition. No noticeable size effect on physical properties is observed.
引用
收藏
页码：146 / 155
页数：10
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