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<p>Holmium-doped calcium–strontium hexaferrite (Ca<sub>0.5</sub>Sr<sub>0.5</sub>Fe<sub>12−x</sub>Ho<sub>x</sub>O<sub>19</sub>) is synthesized via the sol–gel auto-combustion method with varying Ho concentrations (x = 0.00, 0.03, 0.06, and 0.09) to investigate its structural and magnetic properties. Comprehensive characterization are performed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and vibrating sample magnetometry (VSM). XRD analysis confirms the formation of a single-phase hexagonal structure (P<sub>63</sub>/mmc space group) with crystallite sizes ranging from 51 to 58 nm. SEM micrographs reveals that Ho incorporation promots grain growth, influencing the material’s microstructure. Magnetic studies demonstrate a progressive enhancement in both saturation magnetization (26.995–34.663 emu/g) and remanence magnetization (15.648–19.921 emu/g) with increasing Ho content, indicating an improvement in the material’s intrinsic magnetic performance. Furthermore, the synthesized nanoparticles exhibit excellent stability and reusability in recycling assessments. These findings underscore the potential of Ca–SrFO hexaferrite for advanced applications in data storage, magnetic filtration, and next-generation magnetic technologies.</p>

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Unveiling the structural, morphological, and magnetic effects of holmium substituted calcium–strontium based ferrite nanoparticles

  • 期刊论文

  • 发表日期：

    2025年8月2日

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  • N. Bano,
  • I. Hussain,
  • E. A. Alghamdi,
  • S. U. Asif,
  • H. S. Althobaiti,
  • F. S. Alfaifi

摘要

Holmium-doped calcium–strontium hexaferrite (Ca0.5Sr0.5Fe12−xHoxO19) is synthesized via the sol–gel auto-combustion method with varying Ho concentrations (x = 0.00, 0.03, 0.06, and 0.09) to investigate its structural and magnetic properties. Comprehensive characterization are performed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and vibrating sample magnetometry (VSM). XRD analysis confirms the formation of a single-phase hexagonal structure (P63/mmc space group) with crystallite sizes ranging from 51 to 58 nm. SEM micrographs reveals that Ho incorporation promots grain growth, influencing the material’s microstructure. Magnetic studies demonstrate a progressive enhancement in both saturation magnetization (26.995–34.663 emu/g) and remanence magnetization (15.648–19.921 emu/g) with increasing Ho content, indicating an improvement in the material’s intrinsic magnetic performance. Furthermore, the synthesized nanoparticles exhibit excellent stability and reusability in recycling assessments. These findings underscore the potential of Ca–SrFO hexaferrite for advanced applications in data storage, magnetic filtration, and next-generation magnetic technologies.