Abstract
Soft magnetic materials are important functional materials in the electrical engineering, radio, and high-tech fields, but thin and brittle flakes present challenges to the manufacturing industry. In this study, the effect and mechanism of saccharin sodium in reducing the internal stress of Fe-Ni magnetic films were analyzed. The effects of the pH value, temperature, and the concentration of saccharin sodium on the deposition process of Fe-Ni alloys were investigated. The polarization curve of the Fe-Ni alloy deposition process was measured by using a multifunctional electrochemical workstation, and the morphology and crystal structure were measured by a scanning electron microscope (SEM) and X-ray diffraction (XRD). The results show that saccharin sodium significantly reduced the stress of the iron-nickel magnetic film; the mechanism through which the internal stress was reduced is analyzed in this paper. Briefly, the Fe2+ and the amino group of saccharin sodium synthesized a metal complex with positive charge on the surface of the electrode, which prevented the hydrogen ions from approaching the cathode and increased the discharge activation energy of the hydrogen ion, which reduced the hydrogen evolution and improved the internal stress of the coating. This research will help to solve the challenges of producing magnetic film, and promotes the application of new stress-reducing agents.
Highlights
Soft magnetic materials are important functional materials in the fields of electrical engineering, radio, and high-tech [1–3]
Based on the above background, this study used the electrochemical method to solve the internal stress problem of the iron-nickel alloy, which is widely used in soft magnetic materials
It is beneficial to apply saccharin sodium in a wider range to solve the problem of the internal stress of soft magnetic materials, in order to promote the industrial production of magnetic thin films through electrochemical methods
Summary
Soft magnetic materials are important functional materials in the fields of electrical engineering, radio, and high-tech [1–3]. The coercivity of amorphous alloy strips of FeNiPB prepared by melt spin-quenching technology was about 8 A/m [32,33] These experimental results proved that eliminating the internal stress can significantly reduce the coercivity of the alloy, thereby reducing the hysteresis loss of the soft magnetic alloy [34–39]. Based on the above background, this study used the electrochemical method to solve the internal stress problem of the iron-nickel alloy, which is widely used in soft magnetic materials. It is beneficial to apply saccharin sodium in a wider range to solve the problem of the internal stress of soft magnetic materials, in order to promote the industrial production of magnetic thin films through electrochemical methods
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