Advanced Ceramics Progress

Advanced Ceramics Progress

Structural and Magnetic Characterization of Cobalt Ferrite Nanofibers Produced by Electrospinning Method

Document Type : Original Research Article

Authors
Zahra Rahmani Boldaji 1
ali Ghasemi 2
Shahab Torkian 3
Mahdieh Akbari Gandomani 1
1 Master, Department of Materials Engineering, Malek Ashtar University of Technology, Shahin Shahr, Isfahan, Iran.
2 Professor, Department of Materials Engineering, Malek Ashtar University of Technology, Shahin Shahr, Isfahan, Iran.
3 Assistant Professor, Department of Materials Engineering, Malek Ashtar University of Technology, Shahin Shahr, Isfahan, Iran.
10.30501/acp.2025.486481.1167
Abstract
Cobalt ferrite, with the general formula CoFe₂O₄, exhibits unique magnetic properties such as high magnetocrystalline anisotropy, high coercive field, intermediate saturation magnetization, and excellent physical and chemical stability. Moreover, the use of nanofibers in the field of magnetic materials is increasingly popular due to their high surface-to-volume ratio, low weight, high porosity, and considerable shape anisotropy. In this research, cobalt ferrite nanofibers with different diameters were produced via electrospinning using a solution containing 8 wt% polyvinylpyrrolidone, with the applied voltage being optimized. Based on the results of energy dispersive spectroscopy (EDS), the presence of Fe, O, and Co elements in the structure of the cobalt ferrite nanofibers was confirmed. Additionally, X-ray diffraction (XRD) analysis revealed that the cobalt ferrite nanofibers are formed in a single phase after calcination at 800 °C. Field emission scanning electron microscopy (FE-SEM) images showed that, by optimizing the applied voltage between the nozzle and the collector, the average diameters of the cobalt ferrite nanofibers were varied between 86 nm and 171 nm. According to vibrating sample magnetometry (VSM), the saturation magnetization, residual magnetization, and coercive field of the optimized sample were measured as 85 A·m²/kg, 61 A·m²/kg, and 1.32 × 10⁵ A/m, respectively. First-order reversal curve (FORC) results showed that increasing the average diameter of the fibers raises magnetostatic interaction. Based on the results of this research, the production of cobalt ferrite nanofibers using the electrospinning method is feasible. Compared to similar studies, higher values of saturation magnetization and coercive field were obtained in this work.
Keywords
CoFe₂O₄
Electrospun Fibers
Magnetic Ceramics
Nanomaterials

Subjects

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  • Receive Date 01 November 2024
  • Revise Date 23 November 2024
  • Accept Date 07 January 2025