Abstract
We electroplated Fe-Co films in a citric-acid-based plating bath with saccharin and sodium lauryl sulfate and evaluated the magnetic properties of the films. The Fe content in the film can be readily controlled by the change in the ratio of the Fe reagent and the Co one, and the Fe content could be obtained from 10 to 90 at.% in our experimental conditions. The change in the saturation magnetization over the Fe content of the film almost agreed with the expected change from the Slater-Pauling curve. The coercivity decreased with increasing the Fe content. From the structural analysis, we found that the grain size reduced with increasing the Fe content, and the grain refinement effect works effectively to reduce the coercivity.
Highlights
Soft magnetic materials with high saturation magnetization are hopeful for industrial applications, and Fe-Co alloys are well-known as high saturation magnetization materials
The change in Ms over the Fe content almost agreed with the expected change from the Slater-Pauling curve and that for the deep eutectic solvent (DES)-based plating bath
We concluded that the citric-acid-based bath with saccharin and sodium lauryl sulfate is attractive for obtaining Fe-Co films with high Ms and low Hc
Summary
Soft magnetic materials with high saturation magnetization are hopeful for industrial applications, and Fe-Co alloys are well-known as high saturation magnetization materials. In our previous studies on the electroplated Fe-Ni films, citric acid was a good complex agent to stabilize plating baths and to obtain good soft magnetic properties.. In our previous studies on the electroplated Fe-Ni films, citric acid was a good complex agent to stabilize plating baths and to obtain good soft magnetic properties.7–9 From these hopeful results, we employed a citric-acid-based plating bath to fabricate Fe-Co films with good magnetic properties.. We confirmed that Fe-Ni films electroplated in the citric-acid-based plating baths have small grains (
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