NSU Research Contributions
Title : Structural and magnetic properties of nanocrystalline Ni0.7-xCuxCd0.3Fe2O4 prepared through Sol-gel method
Authors : M.Arifuzzaman, M.B.Hossen, Md.Harun-Or-Rashid and M.L.Rahman
Abstract : A series of nanocrystalline Ni0.7-xCuxCd0.3Fe2O4 (0 ? x ? 0.5) are synthesized with the aid of an auto-combusted Sol-gel approach and then annealed at 700 °C. Rietveld refinement of X-ray diffraction (XRD) data reveals the cubic spinel phase of the samples with no impurity peaks. The average crystallite size of the materials is found to range from 18 to 29 nm and the mean particle's size is found between 51 and 69 nm. The variation in the lattice constant and volume of the unit cell with Cu content shows the increasing trend. The nanocrystalline nature of the investigated samples is revealed through Field emission electron microscopy (FESEM) and Transmission electron microscopy (TEM) analyses. The magnetic properties of the materials are characterized at room temperature by employing the Vibrating sample magnetometer (VSM) technique. The saturation magnetization and experimental magnetic moment are noticed to decrease up to 20% Cu substitution, thereafter both increase with Cu content. The observed M-H loops, the low values of remanence ratio (Mr/MS) and coercivity of the studied Ni-Cu-Cd materials suggest their soft ferrimagnetic behavior with the existence of multi-domain (MD) magnetic nanoparticles.
|Journal : Materials Characterization||Volume : 171||Year : 2020||Issue : January 2021|
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