期刊
CRYSTALLOGRAPHY REPORTS
卷 53, 期 7, 页码 1177-1180出版社
PLEIADES PUBLISHING INC
DOI: 10.1134/S1063774508070158
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资金
- Belarusian Republican Foundation for Fundamental Research [F06R-078]
- Special Fund of the President of the Republic of Belarus
Nanocrystalline manganite La0.50Ba0.50MnO3 was synthesized by the soft-chemical method. For this purpose, the sol-gel method was modified and improved. A trihydric saturated alcohol, e.g., glycerol, was suggested as a new organic matrix. The crystal structure of the composite was studied by X-ray powder diffraction at room temperature. A La0.50Ba0.50MnO3 powder annealed in air at T = 500 degrees C is characterized by a perovskite-like cubic structure with the unit-cell parameter a = 3.869 angstrom. The chemical composition of the sample was studied by electron-probe X-ray microanalysis. The La : Ba : Mn cation ratio in the material was 1 : 1 : 2. The surface topography was examined with a scanning electron microscope. The crystallite size was similar to 30 nm. The dependence of the crystal structure and the surface topology on the annealing temperature was studied. The high-temperature treatment in air resulted in the growth of larger, micrometer-size, crystallites.
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