Dielectric properties of Li-Ge ferrites

Dielectric properties such as dielectric constant (epsilon') and dielectric loss tangent (tan delta) of Li-Ge ferrites of various compositions have been measured in high frequency from 1 to 13 MHz using HP 4192 A impedance analyser. Plots of dielectric constant (epsilon') versus frequency show a normal dielectric of spinel ferrites. The frequency dependence of dielectric loss tangent (tan delta) is found to be abnormal and giving a peak at 10-MHz frequency. A qualitative explanation is given for the composition and frequency dependence of dielectric constant and dielectric loss tangent. (C) 2002 Elsevier Science B.V. All rights reserved.