Samples having the chemical formula Li0.5+xNbx Fe2.5-2x O4 (0 ≤ x ≤ 0.20) were prepared by the standard ceramic method. The real part of the dielectric constant έ and the ac conductivity σac are measured at different frequencies from 50-105 Hz and in the temperature range (300-700 K) and then the dielectric loss tangent tan δ was calculated. The sample with x=0.2 showed the lowest values of σac and έ, at any given temperature, as compared with the other samples. Moreover, έ and σac showed an increase with temperature for all samples while tan δ (T) showed a maximum around 600 K. έ and σac are decreased with frequency without relaxation. The effect of Nb concentration on the dielectric parameters is discussed according to the two layer model.
(2006). Temperature, Frequency and Composition Dependence of Dielectric Properties of Nb Substituted Li-ferrites. Egyptian Journal of Solids, 29(1), 131-140. doi: 10.21608/ejs.2006.149148
MLA
. "Temperature, Frequency and Composition Dependence of Dielectric Properties of Nb Substituted Li-ferrites". Egyptian Journal of Solids, 29, 1, 2006, 131-140. doi: 10.21608/ejs.2006.149148
HARVARD
(2006). 'Temperature, Frequency and Composition Dependence of Dielectric Properties of Nb Substituted Li-ferrites', Egyptian Journal of Solids, 29(1), pp. 131-140. doi: 10.21608/ejs.2006.149148
VANCOUVER
Temperature, Frequency and Composition Dependence of Dielectric Properties of Nb Substituted Li-ferrites. Egyptian Journal of Solids, 2006; 29(1): 131-140. doi: 10.21608/ejs.2006.149148
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