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<p>In this study, a straightforward and inexpensive co-precipitation approach was used to create cobalt ferrite (CoFe<sub>2</sub>O<sub>4</sub>) nanoparticles. It was studied how the annealing temperature affected the magnetic, morphological, and structural characteristics. The creation of a single-phase spinel structure with improved crystallinity and larger crystallites after annealing was verified by XRD analysis. Particle size increased with increasing annealing temperatures, according to FESEM pictures, which displayed a consistent spherical shape. According to magnetic measurements, annealing greatly enhanced the magnetic characteristics. At 600 °C, the maximum saturation magnetization (65.277 emu/g) and coercivity (979.884 Oe) were recorded, which were ascribed to enhanced crystallinity and grain development. However, further heating to 800 °C led to reduced magnetic performance due to particle overgrowth and decreased anisotropy. FORC analysis showed an increase in coercive field for the hard phase from 1080 to 1210 Oe after annealing. These findings emphasize the importance of controlled annealing in optimizing the magnetic behavior of CoFe<sub>2</sub>O<sub>4</sub> nanoparticles for advanced technological applications.</p>

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First Order Reversal Curve of as-synthesis and Annealed CoFe2O4 Nanoparticles by Co- Precipitation Method

  • 期刊论文

  • 发表日期：

    2025年5月30日

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  • Ameer F. Shamkhi,
  • Hashim Jabbar

摘要

In this study, a straightforward and inexpensive co-precipitation approach was used to create cobalt ferrite (CoFe2O4) nanoparticles. It was studied how the annealing temperature affected the magnetic, morphological, and structural characteristics. The creation of a single-phase spinel structure with improved crystallinity and larger crystallites after annealing was verified by XRD analysis. Particle size increased with increasing annealing temperatures, according to FESEM pictures, which displayed a consistent spherical shape. According to magnetic measurements, annealing greatly enhanced the magnetic characteristics. At 600 °C, the maximum saturation magnetization (65.277 emu/g) and coercivity (979.884 Oe) were recorded, which were ascribed to enhanced crystallinity and grain development. However, further heating to 800 °C led to reduced magnetic performance due to particle overgrowth and decreased anisotropy. FORC analysis showed an increase in coercive field for the hard phase from 1080 to 1210 Oe after annealing. These findings emphasize the importance of controlled annealing in optimizing the magnetic behavior of CoFe2O4 nanoparticles for advanced technological applications.