Enhanced structural and electrical properties of trivalent substituted w-type hexagonal ferrites

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Hasan M. Khan

The Islamia University of Bahawalpur, Pakistan

: J Nanomater Mol Nanotechnol

Abstract

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Effect of rare earth and divalent (InMn) substitution on the structural electrical and dielectric properties of W-type hexaferrites prepared by sol–gel auto combustion is reported. The synthesized samples were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy electrical and dielectric properties (resistivity and conductivity). The X-ray diffraction analysis confirmed single phase M-type hexa-ferrite structure. The lattice parameters were found to increase as In Mn contents increases, which is attributed to the ionic sizes of the implicated cations. The InMn seems to be completely soluble in the lattice. The results of scanning electron microscopy show that the grain size decreases with increase of In Mn substitution. The increased anisotropy and fine particle size are useful for many applications, such as improving signal noise ratio of recording devices.
Reference:
1. Hasan M. Khan, M.U. Islam, Yongbing Xu, Muhammad Naeem Ashiq, Irshad Ali, M. Asif Iqbal, Muhammad Ishaque, “Structural and Magnetic Properties of Pr-Ni Substituted Ca0.5Ba0.5Fe12O19 hexa-ferrite Nanoparticles” Ceramics International, Volume 40, Issue 5, June 2014, Pages 6487–6493.
2. M. Asif Iqbal, Misbah-ul-Islam, Irshad Ali, Hasan M. Khan, Ghulam Mustafa, Ihsan Ali “Study of Electrical Transport Properties of Eu Substituted MnZn-Ferrites Synthesized by Co-precipitation Technique”, Ceramics International 39 (2013) 1539-1545.

Biography

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Hassan Mehmood Khan has completed his PhD at the age of 30 and is working as Assistant Professor at the Institute of Physics The Islamia University of Bahawalpur Pakistan the fields of interest include Condensed matter Physics, Magnetic materials, Nanomaterials, Synthesis characterization, Nanocrystalline soft ferrites, Nanostructured hard ferrites, Microwave and other high frequency applications of Ferrites.