Abstract
Cu substituted lithium ferrites with composition Li0.5-x/2CuxFe2.5-x/2O4 (where x = 0.0, 0.1, 0.2, 0.4 and 0.6) were synthesized by conventional double sintering ceramic technique and sintered at 1100oC for 3 hours in the normal atmosphere. The microstructures for the samples of different compositions were examined by scanning electron microscope (SEM). The average grain size was determined by the linear intercept method which demonstrates that the average grain size increases with the increase of Cu content. The initial permeability was found to increase with Cu content, x, which is attributed to increase of grain size of the samples. The parameters of hysteresis curve have been determined at room temperature by B-H Loop Tracer. It was found that coercivity and initial permeability were closely related to each other which are mainly governed by the anisotropy and grain size of the mixed ferrites. DOI: http://dx.doi.org/10.3329/jbas.v37i2.17551 Journal of Bangladesh Academy of Sciences, Vol. 37, No. 2, 121-129, 2013
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