Photoinduced Effect in Quasi-Longrange Ferroelectric Fluctuation on Bismuth Layered Perovskites BaBi4Ti4O15

被引：2

作者：

Muta, Ayaka ^{[1
]}

Takesada, Masaki ^{[1
]}

Kataoka, Shinya ^{[1
]}

Onodera, Akira ^{[1
]}

Noguchi, Yuji ^{[2
]}

Miyayama, Masaru ^{[2
]}

机构：

[1] Hokkaido Univ, Dept Phys, Fac Sci, Sapporo, Hokkaido 0600810, Japan

[2] Univ Tokyo, Res Ctr Adv Sci & Technol, Meguro Ku, Tokyo 1538904, Japan

来源：

FERROELECTRICS | 2011年 / 411卷

基金：

日本学术振兴会;

关键词：

DC ELECTRIC-FIELD; PHASE-TRANSITION; DIELECTRIC-CONSTANT; LASER IRRADIATION; RAMAN-SCATTERING; OXIDES; PHONON; SRTIO3; MODE; PB2BI4TI5O18;

D O I：

10.1080/00150193.2010.493076

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ultraviolet (UV) photoexcited effect in the bismuth layered perovskite oxide BaBi4Ti4O15 was investigated by Brillouin scattering using a Sandercock-type tandem Fabry-Perot interferometer on six-pass stage with the finesse more than 100. The temperature dependences of Brillouin scattering spectra were obtained with and without UV photoirradiation with energies higher than the band gap energy from 300 K to 900 K. A central peak and acoustic phonon mode show anomalies from 600 K to 800 K under a UV photoirradiation. The results indicate that the UV photoirradiation affects the quasi-longrange ferroelectric fluctuation near the ferroelectric phase transition point.

引用

页码：44 / 51

页数：8

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