This study involved the synthesis of nanoferrite powders SrFe12O19 (M-type hexaferrite) and NiFe2O4 (spinel) using Calotropis gigantea (crown) flower extract. Then nanocomposites (SrFe12O19/NiFe2O4) with different mass ratios (M:S - 9:1, 8:2, 7:3, 6:4, 5:5) were prepared and their structure was determined. Microstructure, magnetic, electrical transport, and dielectric properties. The average crystallite size ranged from 25 nm to 44 nm, and the M-phase crystallite size decreased with increasing spinel phase. XRD analysis confirmed the presence of both M and S phases in the composite. Analysis of the M-H loop showed that the coercive force (3181-326 Oe) and saturation magnetization (57.5 Am2/kg-40 Am2/kg) decreased with increasing spinel phase. Nanocomposites with mass ratios of 9:1, 8:2, 7:3, and 6:4 showed hard ferrite behavior, while the ratio of 5:5 showed soft magnetic properties. However, all the prepared compounds had a multi-domain structure. Weak exchange interactions are combinations 9:1 and 8:2, partial exchange interactions are combinations 7:3 and 6:4, and full exchange interactions are found 5:5.
DOI: Article Tailoring magnetic and dielectric properties of SrFe12O19/Ni...
#Research #MHLoopsAnalysis #XrayDiffractionAnalysis #MultiDomainStructure #Innovation #DielectricProperties #MicrostructuralProperties #ExchangeCouplingInteractions
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