Abstract
A low-temperature co-precipitation approach was used to prepare Mn0.25Cu0.25Zn0.5Fe2-xCrxO4 (x=0.0, 0.4). The X-ray diffraction with most intense (311) peak and crystallite size in the range 25-29 nm confirms the formation of spinel nano ferrites. The transmittance within 400-600 cm-1 for all samples confirms Fe-O bond at tetrahedral and octahedral sites of prepared spinel nano ferrites demonstrated by FTIR. The soft magnetic nature of prepared material was recorded by VSM. The small Coercivity (16.6032 &20.9224 Oe), retentivity (1.4588 &1.5617 emu/g) and magnetic saturation (23.83 &31.8169 emu/g) demonstrates superparamagnetic, pseudo single domain and randomly oriented multi-domain nature of the nano ferrites. The produced superparamagnetic nano ferrites advantageous in high frequency and biomedical applications.
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