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Magnetic, dielectric and electrical properties of lithium-magnesium ferrites

Das, M.K., Rahman, M.M.ORCID: 0000-0002-6778-7931, Sonia, B.M., Ahmed, F., Hossain, M.A., Rahaman, M., Bashar, M.S., Hossain, T., Saha, D.K. and Akhter, S. (2013) Magnetic, dielectric and electrical properties of lithium-magnesium ferrites. Advanced Chemistry Letters, 1 (2). pp. 104-110.

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A series of polycrystalline spinel type ferrites with composition Li x Mg0.5Ni0.5– 2 x Fe2+ x O4, where x = 0.00 to 0.25 in steps of 0.05, have been prepared by standard double sintering method sintered at temperature 1200 °C in air for 6 hours. In this work, investigations have been carried out by the measurements of X-ray diffraction (XRD), Curie temperature, permeability, loss tangent, Q-factor, dielectric constant and ac electrical resistivity of the samples. Some measurements have been done at room temperature while other measurements have been done as a function of temperature and as a function of frequency in the range from 1 kHz to 500 kHz. Curie temperature, the real part of initial permeability (μ i ), the loss tangent (tan δ), and the Q-factor have been found to be decreased with the increase of Ni-content of Li x Mg0.5Ni0.5– 2 x Fe2+ x O4 ferrites. The frequency characteristic of dielectric constant and AC resistivity decreases with the increase in frequency and increases with the increase in Ni-content.

Item Type: Journal Article
Murdoch Affiliation(s): School of Engineering and Information Technology
Publisher: American Scientific Publishers
Copyright: © 2013 by American Scientific Publishers
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