Observation of phonons in multiferroic BiFeO3 single crystals by Raman scattering

被引：81

作者：

Fukumura, H. ^{[1
]}

Matsui, S.

Harima, H.

Takahashi, T.

Itoh, T.

Kisoda, K.

Tamada, M.

Noguchi, Y.

Miyayama, M.

机构：

[1] Kyoto Inst Technol, Dept Elect & Informat Sci, Kyoto 6068585, Japan

[2] Kyoto Inst Technol, Dept Macromol Sci & Engn, Kyoto 6068585, Japan

[3] Wakayama Univ, Dept Phys, Wakayama 6408510, Japan

[4] Univ Tokyo, Adv Sci & Technol Res Ctr, Tokyo 1538904, Japan

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2007年 / 19卷 / 36期

关键词：

D O I：

10.1088/0953-8984/19/36/365224

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have grown BiFeO3 bulk single crystals by a flux method and characterized the phonon spectra in detail by Raman scattering in the temperature range 4-1100 K. All the 13 Raman-active phonon modes predicted by group theory, 4A(1) + 9E, were observed at low temperature and successfully assigned by a polarized Raman measurement. Moreover, drastic spectral changes in the Raman spectra were observed at temperatures 600-700 K and 1000-1100 K. These features are discussed from the viewpoint of phonon coupling with the magnetic ordering and the structural phase transition, respectively.

引用

页数：7

共 13 条

[1] ANHARMONIC EFFECTS IN LIGHT-SCATTERING DUE TO OPTICAL PHONONS IN SILICON [J].