A series of Ni1-xCuxFe2O4 (0.0 ≤ x ≤ 1.0) nanofibers have been synthesized employing
electrospinning method at 650°C. The effect of Cu substitution on
structural, morphology and magnetic properties of NiFe2O4 nanofibers is reported.
The XRD analysis showed the formation of single-phase cubic spinel
Ni-Cu ferrite and an increasing behavior of lattice constant. The surface
morphology is characterized by SEM, it is investigated that nanofibers have
uniform and continuous morphology. The VSM results showed Cu substitution
played an important role in magnetic properties of Ni1-xCuxFe2O4. The
saturation magnetization (Ms) decreases linearly with increasing Cu2+ content,
while coercivity (Hc) has slowly decreased before x ≤ 0.5, and then sharply increased
to 723.9 Oe for x = 1.0. The magnetic properties of Ni1-xCuxFe2O4 can
be explained in Neel’s model, cation distribution and shape anisotropy.
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