Hydrothermal Synthesis, Structural and Electromagnetic Properties of Mn Substituted Ni Ferrite Nanoparticle

Abstract

Synthesis, Structural and Electromagnetic Properties of Mn Substituted Ni Ferrite Nanoparticle Manganese substituted nickel ferrite nanoparticles (MnxNi1-xFe2O4) have studied in this research work. Hydrothermal Method is used to synthesize all the samples at 200℃ for 12 hours. The effect of manganese substitution on particle size, structure, electric and magnetic properties has been investigated by X-Ray Diffraction (XRD) and Vibrating Sample Magnetometer (VSM). X-Ray diffraction shows that all the sample (x=0, 0.6, 1) peaks have cubic crystalline structure. Crystallite size calculated by Debye Scherer’s formula. Average crystallite size is found by 25.96nm-47.3nm. The peak position (2θ) of the samples shifted to lower angles by substitution of manganese in nickel ferrite. Substitution of manganese in the nickel ferrite increases the lattice constant and decreases the crystallite size. Increase in lattice constant is due to the larger ionic radii of manganese replaced by smaller ionic radii of nickel. Growth rate is very fast at (x=0), further increase in substitution of manganese in the nickel ferrite decreases the growth rate at (x=1). Magnetic properties are measured by VSM at room temperature. Hysteresis loop is used to measure the magnetic parameter such as saturated magnetization, coercivity and remnant magnetization. The atomic magnetic moment of manganese is greater than nickel ferrite. Substitution of manganese in the nickel ferrite increases the saturated magnetization whereas, coercivity decrease. Saturated Magnetization in the range of 55.4- 77.9emu/g. However, the composition with manganese content x=0.6 and nickel 1-x 0.4, coercivity of 106Oe shows nearly super paramagnetic behavior. Remnant magnetization also increase by substituting the manganese in the nickel ferrite.