Synthesis and structure of nanocrystalline La{sub 0.50}Ba{sub 0.50}MnO{sub 3}

Journal Article · Mon Dec 15 04:00:00 EST 2008 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774508070158· OSTI ID:22050913

Fedotova, V V ^[1]; Trukhanov, A V; Stepin, S G ^[2]; Szymczak, H ^[3]

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1. National Academy of Sciences of Belarus, Joint Institute of Solid-State and Semiconductor Physics (Belarus)
2. Vitebsk State University (Belarus)
3. Polish Academy of Sciences, Institute of Physics (Poland)

Nanocrystalline manganite La{sub 0.50}Ba{sub 0.50}MnO{sub 3} 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 La{sub 0.50}Ba{sub 0.50}MnO{sub 3} powder annealed in air at T = 500{sup o}C is characterized by a perovskite-like cubic structure with the unit-cell parameter a = 3.869 A. 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 {approx}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.

• OSTI ID: 22050913
• Journal Information: Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 7 Vol. 53; ISSN CYSTE3; ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AIR
ANNEALING
CATIONS
CHEMICAL COMPOSITION
CRYSTAL GROWTH
CRYSTAL STRUCTURE
CRYSTALS
GLYCEROL
MICROANALYSIS
NANOSTRUCTURES
PEROVSKITE
POWDERS
SCANNING ELECTRON MICROSCOPY
SOL-GEL PROCESS
SURFACES
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TOPOLOGY
X-RAY DIFFRACTION