Transport and magnetic properties of Co-Zn-La ferrite

Citation:
Ahmed, M. A., N. Okasha, and M. Gabal, "Transport and magnetic properties of Co-Zn-La ferrite", Materials Chemistry and Physics, vol. 83, issue 1, pp. 107 - 113, 2004.

Abstract:

The dielectric constant (ε′) and dielectric loss factor (ε″) for the ferrite Co1-xZnxLa yFe2-yO4; 0.1≤x≤1.0 were measured at different frequencies (100kHz to 5MHz) and different temperatures (300-850K). More than one type of polarization participates in the dielectric process, Maxwell Wagner polarization is the one participating in the high temperature region. The electrical conductivity measurement showed that there is more than one conduction mechanism participating in conductivity. The hopping mechanism either by holes or electrons or both is the predominant one. The increase in conductivity is due to the thermally activated mobility and not to thermal creation of additional mobile charge carriers. The replacement of Fe 3+ by La on octahedral sites and the presence of Co2+ as well as Zn2+ ions on the tetrahedral sites play a significant role in the electrical and magnetic properties behavior of the investigates samples. The values of the activation energy obtained indicate the semi-conducting behavior of the investigated ferrite. © 2003 Published by Elsevier B.V.

Notes:

Cited By (since 1996):18Export Date: 11 February 2014Source: ScopusCODEN: MCHPDLanguage of Original Document: EnglishCorrespondence Address: Ahmed, M.A.; Physics Department, Faculty of Science, Cairo University, Giza, Egypt; email: moala47@hotmail.com

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