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<p>The Fe₂CuAl Heusler alloy is considered a valuable candidate for future magnetic technologies, including spintronics, sensing, and data storage, due to its adjustable magnetic characteristics. In this work, a mechanical alloying approach was employed to synthesize Fe₂CuAl powders, followed by comprehensive structural and magnetic characterization. XRD analysis confirmed the formation of a nanocrystalline Fe₂CuAl phase after 24 h of milling, accompanied by an increasing lattice parameter with milling duration, indicating solute diffusion. SEM revealed significant morphological evolution toward homogeneous and refined particles. Magnetic hysteresis measurements demonstrated a peak in coercivity at 8 h (102.4 Oe), attributed to microstructural refinement, while the saturation magnetization remained within a narrow range (95.9–104.9 emu/g). A declining trend in the Mr/Ms ratio beyond 24 h suggests an increase in structural disorder. Overall, the synthesized Fe₂CuAl alloy exhibits a stable A2-type disordered structure<b>,</b> demonstrates the effectiveness of mechanical alloying to fine-tune microstructure and magnetic behavior in Fe-based Heusler systems, offering insights into their optimization for magnetic device applications.</p>

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Structural and magnetic characterization of nanocrystalline Fe₂CuAl Heusler alloy powders synthesized by mechanical alloying

  • 期刊论文

  • 发表日期：

    2025年12月23日

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  • Hanane Mechri,
  • Hamza Azzaz,
  • Fatiha Djaidi,
  • Mohammed Azzaz

摘要

The Fe₂CuAl Heusler alloy is considered a valuable candidate for future magnetic technologies, including spintronics, sensing, and data storage, due to its adjustable magnetic characteristics. In this work, a mechanical alloying approach was employed to synthesize Fe₂CuAl powders, followed by comprehensive structural and magnetic characterization. XRD analysis confirmed the formation of a nanocrystalline Fe₂CuAl phase after 24 h of milling, accompanied by an increasing lattice parameter with milling duration, indicating solute diffusion. SEM revealed significant morphological evolution toward homogeneous and refined particles. Magnetic hysteresis measurements demonstrated a peak in coercivity at 8 h (102.4 Oe), attributed to microstructural refinement, while the saturation magnetization remained within a narrow range (95.9–104.9 emu/g). A declining trend in the Mr/Ms ratio beyond 24 h suggests an increase in structural disorder. Overall, the synthesized Fe₂CuAl alloy exhibits a stable A2-type disordered structure, demonstrates the effectiveness of mechanical alloying to fine-tune microstructure and magnetic behavior in Fe-based Heusler systems, offering insights into their optimization for magnetic device applications.