In our research, we explored Cu-Cr co-substituted M-type barium hexaferrites synthesized through a green approach with mentha leaves extract. The hexaferrite series, BaCuxCrxFe12‐2xO19, underwent heat treatment at 1100 °C, revealing M-phase formation and a secondary BaFe2O4 phase. Raman spectroscopy confirmed successful Cu-Cr substitution, maintaining hexagonal shapes observed in FESEM images. All samples exhibited hard magnetic properties, with x = 0.2 composition showing maximum Ms of 68.99 Am2/kg and minimum Hc of 0.1 T. Cole-Cole graphs indicated peak position shifts with Cu-Cr substitutions, offering insights into grain and grain boundary roles. These findings suggest promising applications of these hexaferrites in lossless, low-frequency scenarios.
DOI: https://doi.org/10.1016/j.mtcomm.2023.107214
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