Abstract
Studies on preparation and characterization of Zn substituted Li–Mg ferrites having the general formula Li x Mg 0.4Zn 0.6−2 x Fe 2+ x O 4 (where x=0, 0.05, 0.1, 0.15, 0.2, 0.25, and 0.3) have been carried out. These polycrystalline ferrites were prepared by a standard ceramic technique. The single-phase formation was confirmed from X-ray diffractograms. The lattice parameter ‘ a’, bond lengths R A, R B and site radii r A, r B were found to increase linearly with increase in Zn content. IR absorption spectral studies show two fundamental absorption bands ν 1 and ν 2 in the frequency range 600–400 cm −1. The center frequency of ν 1 and ν 2 was found to shift towards low frequency side. The average grain diameter determined from SEM studies was found to increase with Zn content, it is maximum for Zn=0.3 and then it decreases with further increase in Zn content. The Curie temperature was found to decrease linearly with Zn content.
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