Optical properties of BiFeO3 ceramics in the frequency range 0.3-30.0 THz

被引：46

作者：

Komandin, G. A. ^{[1
]}

Torgashev, V. I. ^{[2
]}

Volkov, A. A. ^{[1
]}

Porodinkov, O. E. ^{[1
]}

Spektor, I. E. ^{[1
]}

Bush, A. A. ^{[3
]}

机构：

[1] Russian Acad Sci, AM Prokhorov Gen Phys Inst, Moscow 119991, Russia

[2] So Fed Univ, Rostov Na Donu 344006, Russia

[3] Tech Univ, Moscow State Inst Radio Engn Elect & Automat, Moscow 119454, Russia

来源：

PHYSICS OF THE SOLID STATE | 2010年 / 52卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

RAMAN-SCATTERING; TEMPERATURE;

D O I：

10.1134/S1063783410040104

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Reflection and transmission infrared spectra of BiFeO3 ceramic samples have been measured using submillimeter spectroscopy (on a backward-wave tube spectrometer) and Fourier-transform infrared spectroscopy in the frequency range from 5 to 1000 cm(-1) at temperatures in the range from 10 to 500 K. New resonant modes (probably, magnetic in nature) with the eigenfrequencies decreasing with an increase in the temperature have been recorded in the range 10-30 cm(-1) by IR spectroscopy for the first time. An additional absorption with a fairly large dielectric contribution has been revealed in the range 30-60 cm(-1). It has been demonstrated that the corresponding oscillators couple with both the lowest frequency phonon mode and the magnetic subsystem.

引用

页码：734 / 743

页数：10

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