Authors: S K Chawla Prabhjyot Kaur R K Mudsainiyan S S Meena S M Yusuf
Publish Date: 2014/12/05
Volume: 28, Issue: 5, Pages: 1589-1599
Abstract
The aim of this work is to compare the formation temperatures structural and macroscopic magnetic properties of Srhexaferrite SrM in the presence of different fuels In this research SrM powder was synthesized by a sol–gel autocombustion route using different hydroxycarboxylic acids citric acid tartaric acid sucrose gluconic acid and lactic acid Completion of reaction was followed by Fourier transform infrared spectroscopy FTIR and Xray diffraction XRD The obtained powders were further characterized by thermal gravimetric analysis–differential thermal analysis TGA–DTA energydispersive spectroscopy EDS and scanning electron microscopy SEM Their magnetic properties were studied using Mössbauer spectroscopy and magnetic measurements were done by vibrating sample magnetometer VSM The influence of different fuels was reflected on the formation temperature phase purity and morphology of crystallites as well as on their magnetic properties The results show the finest crystallite size has been obtained as 2785 nm from XRD in the case of sucrose sample The lowest calcination temperature of 800 ∘C is obtained in the case of citric acid and tartaric acid samples while sintering at 900 ∘C is necessary when sucrose was applied as a fuel Lactic acid sample results in low phase purity even at 1000 ∘C All the four samples show high level of magnetic properties However the sample prepared by citric acid as fuel has the highest specific saturation magnetization M S and that with sucrose has the highest coercivity H C while the sample prepared using lactic acid has the lowest magnetic parameters
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