Combustion synthesis and characterization of perovskite La0.9Sr0.1MnO3

Nanoparticles of the La0.9Sr0.1MnO3 (LSMO) have been synthesized by using combustion method in which polyvinyl alcohol was used as fuel and an ion complexing agent. Thermogravimetric analysis shows the stable phase formation takes place at temperature above 700°C. The X-ray diffraction study of prep...

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Bibliographic Details
Published in:Materials chemistry and physics 2012-06, Vol.134 (2-3), p.881-885
Main Authors: Shinde, K.P., Thorat, N.D., Pawar, S.S., Pawar, S.H.
Format: Article
Language:English
Subjects:
Band spectra
Combustion
Combustion synthesis
Dielectric constant
Direct current
Dispersions
Electrical properties
Electron microscopy
Magnetic materials
Sintering
Surface layer
Texture
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Summary:Nanoparticles of the La0.9Sr0.1MnO3 (LSMO) have been synthesized by using combustion method in which polyvinyl alcohol was used as fuel and an ion complexing agent. Thermogravimetric analysis shows the stable phase formation takes place at temperature above 700°C. The X-ray diffraction study of prepared sample confirms the rhombohedral phase formation. The texture coefficient (TC) has been calculated. The compositional analysis was carried out by EDAX pattern. The significant band at 532cm−1 in the IR spectrum confirms the presence of characteristic band of LSMO. The nanocrystalline nature was corroborated by TEM micrographs and observed particle size about 20nm. The frequency dependent dielectric constant (ɛ) shows the usual dispersion behavior and dielectric constant decreases with increase in frequency. The DC resistivity measurement with temperature indicates a semiconducting behavior of the LSMO sample. ► Nanocrystalline La0.9Sr0.1MnO3 samples prepared by combustion method with rhombohedral crystal structure. ► TG–DTA shows the stable phase formation take place above 700°C. ► The dielectric constant decreases continuously with increasing frequency. ► The DC resistivity measurement shows the semiconducting behavior of the LSMO.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2012.03.085