Optical, electrical and magnetic properties of lanthanum strontium manganite La1-xSrxMnO3 synthesized through the citrate combustion method.

Author(s) Turky, A.Omar; Rashad, M.Mohamed; Hassan, A.Mostafa; Elnaggar, E.M.; Bechelany, M.
Journal Phys Chem Chem Phys
Date Published 2017 Mar 01
Abstract

Generally, strontium-doped lanthanum manganites (LSM) are materials connected ordinarily as cathodes in the solid oxide fuel cell (SOFC). In this study, the structural, optical, electrical and magnetic properties of La1-xSrxMnO3 (x = 0.2, 0.5, 0.8) synthesized using an organic acid precursor strategy were investigated, based on using citric acid as a fuel. Evidently, the results disclosed that a pure single monoclinic LSM phase was obtained from the thermally treated precursors annealed at 1000 °C with an annealing time of 2 h. The microstructure of the formed sample relied on the Sr(2+) ion content. Moreover, a good optical transparency of 45-60% in a wide range of wavelengths between 800 and 1800 nm for all samples substituted by Sr(2+) ions was performed. The optical band gap energy was increased from 2.09 to 2.76 eV by increasing the Sr(2+) ion molar ratios. The trend in the calculated refractive index, the high frequency dielectric constant (εα) and the static dielectric constant (ε0) of all the produced samples can be linked to an increase in the Sr(2+) ion concentration. Moreover, the magnetic properties were enhanced with increasing Sr(2+) ion content.

DOI 10.1039/c6cp07333f
ISSN 1463-9084
Citation Turky AO, Rashad MM, Hassan AM, Elnaggar EM, Bechelany M. Optical, electrical and magnetic properties of lanthanum strontium manganite La1-xSrxMnO3 synthesized through the citrate combustion method. Phys Chem Chem Phys. 2017;19(9):6878-6886.

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