Paper Title
Conductivity Measurement In Rare Earth Compounds

Abstract
Rare earth materials are a fascinating group of functional materials which have wide-ranging applications in many fields reaching Solid Oxide Fuel Cells (SOFCs) to biological imaging. In this work an attempt is made to enhance the ionic conductivity of rare earth compounds. Different parameters like decrease in grain size, doping of trivalent cations and multiple doping were studied for this purpose. Composite mediated hydrothermal technique was used for synthesis of the CeO2, Ce1-2xGdxLaxOδ and Ce1-2xGdxNdxOδ (x = 0.1, 0.25) samples. Electrical conductivity was measured in temperature range, room temperature to 700 0C and frequency range, 1 kHz to 3MHz at different temperatures. The jump relaxation model can be used to explain the dc conductivity behavior. The stepin dispersion curves is confirmation of the grain interior and grain boundary conductivities in ac measurements. Jonscher power law defined the ac conductivity behavior. Keywords- Earth Compounds, Solid Oxide Fuel Cells, ionic conductivity