Vibrational Spectroscopy and Electron-Phonon Interactions in Microwave-Hydrothermal Synthesized Ba(Mn1/3Nb2/3)O3 Complex Perovskites

被引：13

作者：

Dias, Anderson ^{[1
]}

Matinaga, Franklin M. ^{[2
]}

Moreira, Roberto L. ^{[2
]}

机构：

[1] Univ Fed Ouro Preto, Dept Quim, BR-35400000 Ouro Preto, MG, Brazil

[2] Univ Fed Minas Gerais, Dept Fis, ICEx, BR-30123970 Belo Horizonte, MG, Brazil

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2009年 / 113卷 / 29期

关键词：

RAMAN-SPECTROSCOPY; CERAMICS; MODES; BA2MNWO6; CRYSTALS; NANORODS; PROGRESS; POWDERS; ZNO;

D O I：

10.1021/jp902616a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ba(Mn1/3Nb2/3)O-3 ceramics were synthesized by the microwave-hydrothermal process. Crystalline, single-phase, needle-like materials were obtained with high anisotropy and aspect ratio. Large crystals could be prepared from a direct combination of nanosized crystals under microwaves through an oriented attachment mechanism, Infrared and Raman spectroscopies showed perfect agreement with group-theoretical approaches for a trigonal, P (3) over bar ml structure. Franck-Condon modes were identified in Raman scattering experiments conducted in different wavelengths, laser powers, and temperatures. The results showed that the Mn ions exhibit a particular role in the lattice dynamics in complex perovskites.

引用

页码：9749 / 9755

页数：7

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