Effect of high pressure on multiferroic BiFeO3

被引：147

作者：

Haumont, R. ^{[2
]}

Bouvier, P. ^{[1
]}

Pashkin, A. ^{[3
]}

Rabia, K. ^{[3
]}

Frank, S. ^{[3
]}

Dkhil, B. ^{[4
]}

Crichton, W. A. ^{[5
]}

Kuntscher, C. A. ^{[3
]}

Kreisel, J. ^{[1
]}

机构：

[1] CNRS, Grenoble Inst Technol, MINATEC, Mat & Genie Phys Lab, F-38016 Grenoble, France

[2] Univ Paris 11, ICMMO, Lab Physicochim Etat Solide, CNRS, F-91405 Orsay, France

[3] Univ Augsburg, Expt Phys 2, D-86135 Augsburg, Germany

[4] Ecole Cent Paris, Lab Struct Proprietes & Modelisat Solides, F-92290 Chatenay Malabry, France

[5] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 18期

关键词：

bismuth compounds; crystallisation; high-pressure solid-state phase transformations; infrared spectra; multiferroics; space groups; PHASE-TRANSITIONS; TEMPERATURE POLYMORPHISM; MAGNETIC-PROPERTIES; CRYSTAL; STRAIN; FILMS; POLARIZATION; DEPENDENCE; CERAMICS; PHONONS;

D O I：

10.1103/PhysRevB.79.184110

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report experimental evidence for pressure instabilities in the model multiferroic BiFeO3 and, namely, reveal two structural phase transitions around 3.5 and 10 GPa by using diffraction and far-infrared spectroscopy at a synchrotron source. The intermediate phase crystallizes in a monoclinic space group, with octahedra tilts and small cation displacements. When the pressure is increased further the cation displacements (and thus the polar character) of BiFeO3 is suppressed above 10 GPa. The nonpolar orthorhombic Pnma structure observed above 10 GPa is in agreement with recent theoretical ab initio prediction, while the intermediate monoclinic phase has not been predicted theoretically.

引用

页数：10

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