Numéro
J. Phys. IV France
Volume 07, Numéro C1, Mars 1997
7th INTERNATIONAL CONFERENCE ON FERRITES
Page(s) C1-227 - C1-228
DOI https://doi.org/10.1051/jp4:1997186
7th INTERNATIONAL CONFERENCE ON FERRITES

J. Phys. IV France 07 (1997) C1-227-C1-228

DOI: 10.1051/jp4:1997186

Interfacial Dielectric Losses in Co-Doped Ni-Zn Ferrites

G. Nicoara1, M. Steflea2 and M. Toacsan1

1  Institute of Physics and Technology of Materials, P.O. Box MG-7, 76900 Bucharest-Magurele, Romania
2  Bucharest University, Physics Department, 76900 Bucharest-Magurele, Romania


Abstract
The temperature and frequency dependence of tg δ and ε' for Ni0.8Zn0.2CoxFe2-x ferrites was studied in the 102-106 Hz frequency range and 20-200°C temperature range. The experimental curves exhibit aspects very dependent of composition. To verify that interfacial losses, expected to appear in this type of system, are compatible with the experimental results a calculation of the dielectric permittivity and dielectric loss using the Koops' model was made. A good correlation between calculated and experimental curves was found.



© EDP Sciences 1997