<p>In this study, we explore the synthesis and detailed characterization of Ba<sub>0.5</sub>Pr<sub>0.5</sub>Fe<sub>12-x</sub>Al<sub>x</sub>O<sub>19</sub> (x = 0.00, 0.5, 1.0, 2.0) hexaferrites. The hexaferrites samples were prepared through the sol–gel auto-combustion method, with a subsequent calcination process carried out at 1050°C for 4 h. The structural characteristics are evaluated using X-ray diffraction (XRD), surface morphology of the samples was examined through scanning electron microscopy (SEM), and magnetic properties are tested using vibrating-sample magnetometry (VSM). The structural examination demonstrates a reduction in both lattice parameters ‘a’ and ‘c’ as the doping concentration is increased. Magnetic studies show that Al<sup>3+</sup> doping significantly increases coercivity, from 4.421 to 6.543 kOe, approaching the performance of high coercive magnets. In contrast, the substitution of Pr for Ba has maintained the value of remanence, which normally decreases significantly due to Al substitution. The above findings highlight the potential of M-type hexaferrites to achieve improved magnetic properties by carefully controlling dopant levels, making them a strong alternative to rare-earth magnets in the electromagnetic industry.</p>

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Synergistic effect of Al on structural and magnetic properties of Ba–Pr hexaferrites

  • S. U. Asif,
  • M. Qasim,
  • B. A. Al-Asbahi,
  • M. Shoaib,
  • N. Zafar,
  • U. Nawaz

摘要

In this study, we explore the synthesis and detailed characterization of Ba0.5Pr0.5Fe12-xAlxO19 (x = 0.00, 0.5, 1.0, 2.0) hexaferrites. The hexaferrites samples were prepared through the sol–gel auto-combustion method, with a subsequent calcination process carried out at 1050°C for 4 h. The structural characteristics are evaluated using X-ray diffraction (XRD), surface morphology of the samples was examined through scanning electron microscopy (SEM), and magnetic properties are tested using vibrating-sample magnetometry (VSM). The structural examination demonstrates a reduction in both lattice parameters ‘a’ and ‘c’ as the doping concentration is increased. Magnetic studies show that Al3+ doping significantly increases coercivity, from 4.421 to 6.543 kOe, approaching the performance of high coercive magnets. In contrast, the substitution of Pr for Ba has maintained the value of remanence, which normally decreases significantly due to Al substitution. The above findings highlight the potential of M-type hexaferrites to achieve improved magnetic properties by carefully controlling dopant levels, making them a strong alternative to rare-earth magnets in the electromagnetic industry.