In this study, SrFe12O19 (M-type hexaferrite) and NiFe2O4 (spinel) nano ferrite powders were synthesized separately using Calotropis gigantea (crown) flowers extract. Subsequently, SrFe12O19/NiFe2O4 nanocomposites were prepared with different weight ratios (M:S – 9:1, 8:2, 7:3, 6:4, 5:5). The nanocomposites exhibited structural, microstructural, magnetic, electrical transport, and dielectric property variations based on the ratio. The average crystallite size ranged from 25 nm to 44 nm, with a decrease in M-phase crystallite size as the spinel phase increased. Magnetic analysis showed a decrease in coercivity and saturation magnetization with increased spinel content, designating nanocomposites with 9:1, 8:2, 7:3, 6:4 as hard ferrites and 5:5 as soft magnetic. Exchange coupling interactions varied across ratios, with weak interactions in 9:1 and 8:2, partial in 7:3 and 6:4, and perfect coupling in 5:5. The study employed crown flower extract, known for its medicinal properties, in the green synthesis of nanocomposites, demonstrating potential applications in diverse fields. The composite materials showed multi-domain structures, indicating their suitability for different technological applications. DOI : https://lnkd.in/dAZjsZ_q hashtag#research #hashtag#DielectricProperties hashtag#MicrostructuralProperties
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