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Structural and dielectric properties of lithium nanoferrites synthesised by citrate gel auto combustion method

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Author: 
Vijay Kumar, K., Sangeetha, A. and Rama Krishna, K.
Abstract: 

A series of Lithium nanoferrite with chemical composition of Li0.5+3xFe2.5-XO4 where (X=0.0 to 1.0 in the step of 0.2) is prepared by chemical citrate gel auto combustion method and sintered at 500OC for 4 hours. The single phase cubic structure is confirmed by X-ray diffraction. The effect of structural parameters with function of Lithium composition is studied and the calculated crystallite size ranges from 33-51nm.The microstructure of the samples was studied by using Scanning Electron Microscopy. The room temperature dielectric constant and dielectric loss were measured as a function of frequency from20Hz-10MHz and they showed a dispersive behavior. The variation has been explained by Verwey’s mechanism of electron hopping and Koop’s two layer model.

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