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<p>Herein, we demonstrated that controlled bath temperature can significantly enhance the structural, magnetic, and anti-corrosive characteristics of NiFeCoAlP thin films. XRD profiles confirmed the formation of a solid solution phase with mixed FCC and BCC structures with crystallite sizes ranging from 17 to 24&#xa0;nm. Higher temperatures resulted in grain refinement and increased dislocation density, improving film integrity. SEM revealed smoother and more homogeneous surfaces at high temperatures. The film deposited at 60&#xa0;°C showed optimal magnetic behavior, achieving a high saturation magnetization of 120.18 emu/cm<sup>3</sup> and low coercivity of 7.34 Oe in the in-plane direction, suitable for soft magnetic applications. Electrochemical analyzes showed enhanced corrosion resistance at 70&#xa0;°C, with a high charge transfer resistance (<i>R</i><sub><i>ct</i></sub> = 926.4 Ω cm<sup>2</sup>), low corrosion current density (<i>I</i><sub>corr</sub> = 1.8 µA/cm<sup>2</sup>), and reduced corrosion rate (0.059&#xa0;mm/y), attributed to the formation of a stable passive layer.</p>

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Electrodeposition of NiFeCoAlP thin films: influence on structure, microstructure, composition, magnetic, and corrosion properties

  • 期刊论文

  • 发表日期：

    2025年12月11日

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  • J. Shifa Maheen,
  • M. Ehthishamul Haque,
  • K. Sugandhi,
  • M. Selvambikai,
  • M. Jose

摘要

Herein, we demonstrated that controlled bath temperature can significantly enhance the structural, magnetic, and anti-corrosive characteristics of NiFeCoAlP thin films. XRD profiles confirmed the formation of a solid solution phase with mixed FCC and BCC structures with crystallite sizes ranging from 17 to 24 nm. Higher temperatures resulted in grain refinement and increased dislocation density, improving film integrity. SEM revealed smoother and more homogeneous surfaces at high temperatures. The film deposited at 60 °C showed optimal magnetic behavior, achieving a high saturation magnetization of 120.18 emu/cm3 and low coercivity of 7.34 Oe in the in-plane direction, suitable for soft magnetic applications. Electrochemical analyzes showed enhanced corrosion resistance at 70 °C, with a high charge transfer resistance (Rct = 926.4 Ω cm2), low corrosion current density (Icorr = 1.8 µA/cm2), and reduced corrosion rate (0.059 mm/y), attributed to the formation of a stable passive layer.