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A. M. El-Sayed, M. Sh. Khalil

Synthesis, Structure, Electrical and Magnetic Properties of Li Substituted La/BaMnO_3-δ

Keywords: La/BaMn/LiO3, Polymerized Complex Route, Electrical Conductivity, Magnetic Susceptibility

The characterization of the polycrystalline La_0.7Ba_0.3MnO_3-δ (LBM) and La_0.7Ba_0.3Mn_0.9Li_0.1O_3-δ (LBMLi) samples synthesized via the polymerized complex, sol-gel technique indicates the formation of cubic perovskite crystal structure of both samples by sintering at 900ºC for 2h. Substitution of Mn by Li having smaller ionic radius, leads to decrease the lattice constant and the cell volume which gives rise to a small shift and small intensity difference of the XRD patterns. A nanocrystalline structure of LBMLi with particles in the size range of 30–100nm was obtained. The temperature dependence of electrical conductivity and magnetic susceptibility of LBM and LBMLi were studied. The smaller electrical conductivity values and the calculated magnetic properties of Li substituted the Mn in LBM sample were investigated.

Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0942-9352
Volume: 220, 06/2006
Pages: 753 - 763

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