High spontaneous polarization in PbTiO3-BiMeO3 systems with enhanced tetragonality

被引：37

作者：

Chen, Jun

Hu, Penghao

Sun, Xueyi

Sun, Ce

Xing, Xianran ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Dept Chem Phys, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 17期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2794742

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

PbTiO3 - BiMeO3 (Me=Fe, Zn12Ti12, and Zn34W14) solid solutions exhibit unusually enhanced tetragonality (ca). Lattice dynamics and structure of PbTiO3 - BiMeO3 with enhanced ca were investigated by Raman scattering technique and x-ray Rietveld method, respectively. The A(1)(1TO) soft mode, associated with the order parameter spontaneous polarization (P-S), abnormally shifts upward, which is different with almost all other PbTiO3-based compounds. It is interesting to find that the A(1)(1TO) mode increases linearly with the PS displacement. The PS could be basically judged from the variation of A(1)(1TO) not only with normally reduced ca but also with unusually enhanced ca in the PbTiO3-based systems. (C) 2007 American Institute of Physics.

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