Nano Research & Applications

Tuning the Magneto Structural Properties of Nickel Ferrite Nanoparticles for Different Technological Applications

Magnetic Nickel Ferrite Nanoparticles (MNFNPs), a kind of soft materials possess amazing and attractive properties and have vital technological applications such as a contract agent for magnetic resonance imaging, as an anode in the lithium-ion battery, as a catalyst, sensors and magnetic memory devices and so on. The present study concentrates on the synthesis of Magnetic Nickel Ferrite Nanoparticles (MNFNPs) by the co-precipitation method at different ratios. The elemental composition, structure, and morphology of these nanoparticles were characterized using Energy-Dispersive X-ray Spectroscopy (EDS), X-Ray Diffraction (XRD), and scanning electron microscope (SEM) while magnetic properties were determined using a Vibrating Sagnetic Spectrometer (VSM). The resulting nickel ferrite NPs exhibit very interesting properties. The size of NPs was found to be in the range of 11.7 nm to 260 nm depending upon annealing temperature. It has been observed that size of NPs increasing linearly with temperatures for 700°C and 900°C only. These particles are super paramagnetic at room temperature. The coercivity of these nanoparticles was found to be 0.03 kOe, 0.013 kOe, and 0.003 kOe while saturation magnetization is reported as 36.53 emu/g, 33.29emu/g and 37.23 emu/g respectively. The low saturation magnetization is attributed to the inert/dead layer or disordered surface spin of these MNFNPs.

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