Abstract
New phases which arise from partial substitution of Ti 4+ by Cr 3+ and Li + of the compound La 2/3TiO 3 have been obtained, giving rise to the series La 1.33Li x Cr x Ti 2− x O 6 ( x=0.66, 0.55 and 0.44). These phases adopt a perovskite-type structure as deduced from their structural characterization. Rietveld's analyses of neutron diffraction data show that it is orthorhombic ( S.G. Pbnm) with ordered domains. Conductivity has been examined by complex impedance spectroscopy and it increases with increasing lithium and chromium content. These materials behave as mixed conductors with low activation energies. Magnetic susceptibility variation with temperature shows antiferromagnetic interactions at the lowest temperatures.
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