Ferroelectricity induced by oxygen isotope exchange in strontium titanate perovskite

被引：533

作者：

Itoh, M

Wang, R

Inaguma, Y

Yamaguchi, T

Shan, YJ

Nakamura, T

机构：

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

[2] Meisei Univ, Fac Sci & Engn, Dept Elect Engn, Tokyo 1918506, Japan

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

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.82.3540

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ferroelectricity was induced in SrTiO3 by the isotope exchange of O-18 for O-16, Dielectric measurements confirmed the ferroelectricity of (SrTiO3)-O-18, showing a peak at 23 K. A hysteresis loop in the D vs E measurement and TO phonon observed in the Raman spectra supported the evolution of ferroelectricity in (SrTiO3)-O-18. This is the first demonstration of SrTiO3 becoming fen ferroelectric without the application of external fields or the introduction of a random field through cation substitution.

引用

页码：3540 / 3543

页数：4

共 22 条

[1] DIELECTRIC CONSTANT IN PEROVSKITE TYPE CRYSTALS [J].