Electrical conduction in γ-irradiated and unirradiated zinc-iron ferrites
- Citation:
- Mousa, M. A., and M. A. Ahmed, "Electrical conduction in γ-irradiated and unirradiated zinc-iron ferrites", Journal of Materials Science, vol. 23, issue 9: Kluwer Academic Publishers, pp. 3083 - 3087, 1988.
Abstract:
The electrical conductivity of γ-irradiated and unirradiated finely-divided spinels of composition (Znx2+Fe1-x2+Fe23+)O42-was studied in a nitrogen atmosphere as a function of temperature. The results of both γ-irradiated and unirradiated ferrites with compositions x ≤ 0.79 showed that the electrical conduction occurred by fast electron exchange amongst Fe2+ and Fe3+ ions situated on octahedral sites in the spinel lattice, by a hopping mechanism. For composition x > 0.79 it was found that the transition of the charge carriers through cation vacancies is the predominant mechanism. Some breaks in the conductivity-temperature curves were found near the Curie points. Seebeck voltage measurements showed that γ-irradiated and unirradiated spinels behave as n-type semiconductors. The effect of γ-irradiation on the conductivity, activation energy, charge carriers and the conduction mechanism is discussed. © 1988 Chapman and Hall Ltd.
Notes:
Cited By (since 1996):3Export Date: 11 February 2014Source: ScopusCODEN: JMTSALanguage of Original Document: EnglishCorrespondence Address: Mousa, M.A.; Chemistry Department, Faculty of Science, Benha University, Benha, Egypt