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Magnetic, dielectric and electrical properties of lithium-magnesium ferrites
Journal article   Peer reviewed

Magnetic, dielectric and electrical properties of lithium-magnesium ferrites

M.K. Das, M.M. Rahman, B.M. Sonia, F. Ahmed, M.A. Hossain, M. Rahaman, M.S. Bashar, T. Hossain, D.K. Saha and S. Akhter
Advanced Chemistry Letters, Vol.1(2), pp.104-110
2013
DOI: https://doi.org/10.1166/acl.2013.1022
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Abstract

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.

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