Thermal stability and structural transition of metastable Mn5O8:: in situ micro-Raman study

被引：51

作者：

Azzoni, CB

Mozzati, MC

Galinetto, P

Paleari, A

Massarotti, V

Capsoni, D

Bini, M

机构：

[1] Univ Pavia, Dipartimento Fis Alessandro Volta, INFM, I-27100 Pavia, Italy

[2] Univ Milano Bicocca, Dipartimento Sci Mat, INFM, I-20125 Milan, Italy

[3] Univ Pavia, Dipartimento Chim Fis, I-27100 Pavia, Italy

[4] Univ Pavia, CNR, CSTE, I-27100 Pavia, Italy

来源：

SOLID STATE COMMUNICATIONS | 1999年 / 112卷 / 07期

关键词：

X-ray scattering; phase transitions; inelastic light scattering;

D O I：

10.1016/S0038-1098(99)00368-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The Raman spectrum of the metastable Mn5O8 phase, obtained from slow oxidation of Mn3O4 at low temperature, is presented and analysed for the first time and the thermal stability is monitored by the changes in Raman spectra due to laser-induced thermal treatments. A structural transformation toward the spinel phase Mn3O4 is observed at temperature higher than 1000 K. Other Mn oxides, characterised by intermediate Mn oxidation states, are not detected below or during the transition. A compositional model of the sample grains is also proposed by comparing Raman data with X-ray diffraction and scanning electron microscopy measurements. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：375 / 378

页数：4

共 13 条

[1]

Azzoni CB, 1998, Z NATURFORSCH A, V53, P693

[2] ELECTRONIC PROPERTIES OF TRANSITION-METAL OXIDES .2. CATION DISTRIBUTION AMONGST OCTAHEDRAL AND TETRAHEDRAL SITES [J].