Abstract

Magnetic nanoparticles are a potential material that can be used in a few fields of nanotechnology such as absorbent, catalyst, energy, storage, biomedical, and cancer treatment. Every nanoparticle has different properties, so they will appear unique when two magnetic materials were composited into one unit. Mn0.25Fe2.75O4/NiCo2O4 nanocomposites were successfully synthesized by using simple coprecipitation and sonication methods. To determine the nanostructure and Specificesific Absorption Rate (SAR) value of sample, Mn0.25Fe2.75O4/NiCo2O4 nanocomposites were successfully characterized by using XRD, SEM, and Magneto-thermal instrument, respectively. Based on the data analysis, the XRD profile of Mn0.25Fe2.75O4/NiCo2O4 combining from two phase of Mn0.25Fe2.75O4 and NiCo2O4. By using the Debye Scherer equation, the particle size of Mn0.25Fe2.75O4/NiCo2O4 nanocomposites is about 10.64 nm and presentage of crystallinity is 67.66%. SEM characterization shows that there is agglomeration in the nanocomposites due to the large surface energy between the particles. Properties of superparamagnetic was observed by using VSM, saturation magnetization 17.79 emu/gr and coercivity about 0,15 T. Furthermore, SAR value of Mn0.25Fe2.75O4/NiCo2O4 nanocomposite revealed the optimum value with 0.343 Watt every gram.

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