1- Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Abstract: (326 Views)
Abstract
This research focuses on the fabrication and investigation of the structural and magnetic properties of magnetic oxide nanostructures of a novel Ni-Fe-Pb-Co alloy synthesized by the sol-gel method under argon gas. In this method, nickel nitrate, iron nitrate, lead nitrate and cobalt nitrate were used as precursor materials and citric acid as a chelating agent. The structural properties were investigated using X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). Fourier transform infrared spectroscopy (FT-IR) was used to analyze the chemical bonding of the substance. Also, the thermal stability of the compound was evaluated through thermal gravimetric analysis (TGA). The magnetic properties were determined using a vibrating sample magnetometer (VSM). The results showed that adding cobalt up to a concentration of 0.5 to the Ni-Fe-Pb system increased the saturation magnetization. XRD analysis of the samples showed the formation of a multi-component oxide. FESEM images show uniform particle distribution with a tendency for agglomeration at a temperature of 900 ℃. The Curie temperature of the magnetic oxide nanostructures of Ni-Fe0.5-Co0.5-Pb composition synthesized at 900 ℃ was measured using a Faraday balance and its value is 771 K.
This research focuses on the fabrication and investigation of the structural and magnetic properties of magnetic oxide nanostructures of a novel Ni-Fe-Pb-Co alloy synthesized by the sol-gel method under argon gas. In this method, nickel nitrate, iron nitrate, lead nitrate and cobalt nitrate were used as precursor materials and citric acid as a chelating agent. The structural properties were investigated using X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). Fourier transform infrared spectroscopy (FT-IR) was used to analyze the chemical bonding of the substance. Also, the thermal stability of the compound was evaluated through thermal gravimetric analysis (TGA). The magnetic properties were determined using a vibrating sample magnetometer (VSM). The results showed that adding cobalt up to a concentration of 0.5 to the Ni-Fe-Pb system increased the saturation magnetization. XRD analysis of the samples showed the formation of a multi-component oxide. FESEM images show uniform particle distribution with a tendency for agglomeration at a temperature of 900 ℃. The Curie temperature of the magnetic oxide nanostructures of Ni-Fe0.5-Co0.5-Pb composition synthesized at 900 ℃ was measured using a Faraday balance and its value is 771 K.
Keywords: magnetic oxide contaminated with cobalt, Ni-Fe-Pb-Co composition, sol-gel method, structural features, magnetic features
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