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Investigation of magnetic, dielectric and electrical properties of Ba-hexaferrites

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Abstract

Ba-hexaferrites of composition (BaO)1−x (La2O3)x 5.7 Fe2O3, where x = 0.00, 0.04, 0.08 and BaO 5.7 Fe2O3 + [0.7 wt% CaO + 0.3 wt% SiO2] were prepared by standard double sintering ceramic technology using magnetite from Cox’s Bazar beach sand, Bangladesh. In this work, magnetic, dielectric and electrical properties of Ba-hexaferrites with and without additives have been reported. Measurements of permeability, loss factor, quality factor (Q-factor), resistivity and dielectric constant of the synthesized samples have been carried out. Permeability remains unaltered in the observed frequency range. The loss factor increases with the increase in temperature and additives as well. It has been observed that the loss factor decreases with the increase in frequency. The Q-factor decreases with the increase in temperature and increases with the increase in frequency. The dielectric constant decreases with the increase in frequency. The ac resistivity of Ba-hexaferrites increases with the increase in additive contents.

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Authors and Affiliations

  1. Department of Physics, Jahangirnagar University, Savar, Dhaka, 1342, Bangladesh

    S. Pervin, M. M. Rahman & F. Ahmed

  2. School of Engineering and Energy, Murdoch University, Murdoch, WA, 6150, Australia

    M. M. Rahman

  3. Materials Science Division, Atomic Energy Centre, Ramna, Dhaka, 1000, Bangladesh

    M. A. Hakim

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  1. S. Pervin
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  2. M. M. Rahman
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  3. F. Ahmed
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  4. M. A. Hakim
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Correspondence to M. M. Rahman.

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Pervin, S., Rahman, M.M., Ahmed, F. et al. Investigation of magnetic, dielectric and electrical properties of Ba-hexaferrites. Indian J Phys 86, 1065–1072 (2012). https://doi.org/10.1007/s12648-012-0179-y

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  • DOI: https://doi.org/10.1007/s12648-012-0179-y

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