Authors : S. A. Pawade, V. M. Nanoti and K. G. Rewatkar
Page Nos : 449-455
Description :
Abstract:
The sol–gel auto-combustion technique has been employed to synthesize the M-type Sr-hexaferrites nano materials substituted with mixture of lanthanum and Chromium at the iron site. The phase purity of the samples is confirmed by X-ray diffraction analysis and the nano crystalline granules in the size range of 52 nm obtained. The transmission electron microscopic analysis also confirms that the particles are in nano size (25–50nm) The room temperature DC electrical resistivity is measured by the two point probe method and is found to increase with chromium substitution These materials can be used in microwave devices as these devices require highly resistive materials with low eddy current losses. The review literature leads to the facts that these nano-sized Hexa ferrites could be used in magnetic storage devices; micro waves satellite communications, digital data analysis etc. so that our prepared samples could be proposed to find their vital applications in demanding fields where data storage is of great concern.
Keywords: Strontium ferrite, X-ray density, porosity, electrical conductivity etc
