Electrical and Dielectric Properties of Zn0.8Co0.2Fe2O4

M.A. Ahmed; M.A. El Hiti

doi:doi:10.1051/jp3:1995103

Numéro		J. Phys. III France Volume 5, Numéro 6, June 1995


Page(s)		775 - 781
DOI		https://doi.org/10.1051/jp3:1995103

DOI: 10.1051/jp3:1995103
J. Phys. III France 5 (1995) 775-781

Electrical and Dielectric Properties of Zn $_\mathsf{0.8}$ Co $_\mathsf{0.2}$ Fe $_\mathsf{2}$ O $_\mathsf{4}$

M.A. Ahmed and M.A. El Hiti

Physics Department, Faculty of Science, Tanta University, Tanta, Egypt

(Received 15 November 1994, revised 10 February 1995, accepted 15 March 1995)

Abstract
DC, AC electrical resistivity ( $\rho_{\rm dc}$ and $\rho_{\rm ac}$ ( $\omega$ ) and dielectric properties ( $\varepsilon'$ and $\tan \delta$ ) were studied for Zn _0.8Co _0.2Fe ₂O ₄ ferrite samples prepared at sintering temperatures ( $T_{\rm s}$ ) in the range 1273 to 1473 K by the usual ceramic technique. The experimental results indicated that the DC and AC electrical resistivity, Curie temperature ( $T_{\rm c}$ ) and activation energies for electrical conduction ( $E_{\rm p}$ and $E_{\rm f}$ ) decrease as the sintering temperature increases. The DC electrical conductivity increases as the temperature increases. It was found that $\varepsilon'$ , $\tan \delta$ and $\rho'_{\rm ac}$ ( $\omega$ ) decrease as frequency increases.