The Influence of Diameter and Morphology on Magnetic Properties of Strontium Ferrite Nanofibers

Due to the wide applications of strontium ferrite in various industries and the demand for lightweight devices with enhanced magnetic properties, the fabrication of strontium ferrite nanofibers by electrospinning method has a special place in advanced magnetic materials technology. This is attributed to the possibility of controlling the microstructure and magnetic properties of nanofibers by adjusting the parameters during electrospinning. In this research, strontium ferrite nanofibers produced by electrospinning method using different concentrations of polyvinylpyrrolidone (PVP) and optimizing the parameters of the electrospinning device such as applied voltage, feed rate and the distance between collector and nozzle. Based on energy dispersive spectroscopy (EDS) results, the presence of Fe, O and Sr elements in the structure was confirmed; Based on the X-ray diffraction (XRD) analysis, the results indicate that strontium ferrite was synthesized as a single-phase material. Field emission scanning electron microscopy (FE-SEM) images showed that by optimizing the electrospinning parameters, fibrous structure with less than ۱۰۰ nm in diameter with a long length can be obtained. According to vibrating sample magnetometry (VSM) saturation magnetization, residual magnetization, and coercivity of the optimized sample were obtained ۶۰ A.m۲/kg, ۲۳ A.m۲/kg and ۴.۲۹×۱۰۵ A/m, respectively. It should also be noted that shape anisotropy in magnetic nanofibers has led to high amounts of coercivity. According to the analyses, strontium ferrite nanofibers with desired magnetic properties were formed by electrospinning method.

کلیدواژه ها:

Nanofibers ، Strontium Ferrite ، Electrospinning ، Magnetic ceramics ، Nanomaterials