Ferroelectricity-evoking mass-inequality parameter for perovskite titanates ATiO3

被引：4

作者：

Nakamura, T

Shan, YJ

Itoh, M

Inaguma, Y

机构：

[1] Tokyo Inst Technol, Tokyo 1860002, Japan

[2] Utsunomiya Univ, Fac Engn, Dept Appl Chem, Utsunomiya, Tochigi 3218585, Japan

[3] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan

[4] Gakushuin Univ, Fac Sci, Dept Chem, Toshima Ku, Tokyo 1718588, Japan

来源：

FERROELECTRICS | 2001年 / 259卷 / 1-4期

关键词：

perovskite titanates; origin of displacive ferroelectricity; mass-inequality in TO-mode; two-particle harmonic oscillator;

D O I：

10.1080/00150190108008722

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Based on the two-particle harmonic oscillator treatments for TO-modes in perovskite titanates ATiO(3), we proposed an estimation method of the total TO-amplitude and the excess TO-amplitude delta(TO) caused by mass-inequalities in TO-modes. Supposing that this excess TO-amplitude raises the internal energy of the ATiO(3)-lattice by an amount (1/2)C*delta(TO)(2), we got a linear correlation T-C versus delta(TO)(2) for ferroelectric perovskite titanates PbTiO3, BaTiO3 and 93%O-18-substituted (SrTiO3)-O-18.

引用

页码：91 / 96

页数：6