Temperature And Frequency Spectra Of Ni-Bi Ferrite

Abstract

The dielectric constant spectra of Bismuth substituted nickel ferrite NiBi 0.20 Fe 1.80 O 4 has been reported. The variation of dielectric constant with temperature in the range 50 -500 C shows linear response at constant frequency. The variation of dielectric constant with frequency in the range 500 Hz -1 MHz (decade increase) at constant temperatures also shows almost flat response. This may be attributed to the substitution of Bi 3+ ions at octahedral sites. With higher substitutions of bismuth, this material may be useful in the GHz frequency range applications.