Abstract
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.
Highlights
One-dimensional (1D) nanostructures of spinel ferrite have been a subject of intense research for their interesting chemical and physical properties which different from those of bulk materials [1]
The effect of Cu substitution on structural and morphology of NiFe2O4 nanofibers was been studied by X-ray diffraction (XRD), SEM and TEM
The class of metal ions and cation distribution among A and B sites will affect the magnetic properties of spinel ferrite
Summary
One-dimensional (1D) nanostructures of spinel ferrite have been a subject of intense research for their interesting chemical and physical properties which different from those of bulk materials [1]. NiFe2O4 is a one of most investigated spinel ferrite because of their remarkable properties such as high electrical resistivity, high mechanical hardness, large permeability at high frequency and chemical stability. Cu substitution NiFe2O4 have been the subject of extensive investigation because of the high frequency application as magnetic materials [7]. The substitution of Cu in NiFe2O4 brings about a structural phase transition, makes them a suitable material for various technological applications due to the interesting magnetic and electrical properties [8] [9]. The effect of Cu substitution on structural, morphology and magnetic properties of NiFe2O4 nanofibers will be studied
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