Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry
ISSN: 0975-413X
Abstract
Structural and magnetic study on al substituted MgZn mixed ferrite powders prepared by sol-gel method
Author(s): Ramesh C., K. Maniysundar, Selvanandan S. and Anbarasan P. MAl substituted mixed ferrites of Zn0.3Mg0.7AlxFe(2-x)O4 (x=0.0, 0.1, 0.2, 0.3, 0.4) prepared by sol-gel auto combustion method. The structural studies using XRD and SEM reveal that the obtained samples were in cubic structure with single phase. As the Al substitution increases in this ferrite system the lattice constant decreases from 8.435 Å to 8.362 Å. The average crystallite size calculated using Debye-Scherrer equation and is in the range 26 to 92 nm. The variation in lattice constant and crystallite size attribute due to the replacement of Fe3+ by smaller radii of the Al3+ ion. The magnetic measurements using Vibration Sample Magnetometer (VSM) indicates that the Al3+ preferably occupy B-sites rather than A site. FTIR spectra exhibited two prominent absorption bands in ν1 and ν2, which confirms the redistribution of ions among tetrahedral and octahedral site and spinel nature of these ferrites.
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