High pressure Raman investigations of multiferroic BiFeO3

被引：46

作者：

Yang, Y. ^{[1
]}

Bai, L. G. ^{[2
]}

Zhu, K. ^{[1
]}

Liu, Y. L. ^{[1
]}

Jiang, S. ^{[2
]}

Liu, J. ^{[2
]}

Chen, J. ^{[3
]}

Xing, X. R. ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

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

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2009年 / 21卷 / 38期

关键词：

THIN-FILMS; TEMPERATURE;

D O I：

10.1088/0953-8984/21/38/385901

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have reported a Raman scattering investigation of bismuth ferrite (BiFeO3) under high pressure up to 50 GPa. Distinct changes in the Raman spectra show evidence for three pressure-induced structural transitions. The abrupt frequency redshifts of the Raman modes near 300 cm(-1) at around 3 GPa are attributed to the modulation of the FeO6 octahedral tilts. The disappearance of the modes below 250 cm(-1) at 8.6 GPa, together with the enhancement of the two modes in the range of 300-400 cm(-1), indicate the phase transition from the rhombohedral to orthorhombic symmetry. Afterward, the E-3 and E-4 modes disappear at 44.6 GPa, pointing to the occurrence of the orthorhombic-cubic phase transition, which is consistent with the previous postulate that an orthorhombic-cubic transition takes place across the metal-insulator transition at high pressures.

引用

页数：5

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