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Electrodeposited Fe-Co Films Prepared from a Citric-acid-based Plating Bath
T. Yanai,H. Uto,T. Shimokawa,M. Nakano,H. Fukunaga,K. Suzuki 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
Electrodeposited Fe-Co films are commonly prepared in a boric-acid-based bath. In this research,we applied citric acid instead of boric acid for the plating of Fe-Co films because boron in the wastebath is restricted by environmental-protection regulations in Japan. We evaluated the effect ofcitric acid on the magnetic and structural properties of the films. The saturation magnetization ofthe Fe-Co films slightly increased while the Fe content in the Fe-Co films decreased with increasingcitric acid concentration. The lowest coercivity value of 240 A/m was obtained at a citric acidconcentration of 100 g/L. The plating bath with this citric acid concentration enabled us to obtainFe-Co films with high saturation magnetizations and smooth surface morphologies.
Electrodeposited Fe-Ni Films Prepared from a Tartaric-acid-based Bath
T. Shimokawa,T. Yanai,K. Takahashi,M. Nakano,H. Fukunaga,K. Suzuki 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
Recently, we reported a citric-acid-based plating bath is one of the hopeful plating baths forobtaining Fe-Ni films with good soft magnetic properties. In this report, hydroxylic acid of tartaricacid, which belongs to the same acid group at citric acid, was applied to prepare the films, and theeffects of tartaric acid on the magnetic and the structural properties were investigated. Although theoverall trend of the effects obtained for tartaric acid resembles our previous results for the citricacid-based bath, the cathode efficiency for the tartaric-acid-based bath shows a slightly highervalue as compared with that for the citric-acid-based bath. From these results, we conclude thatthe tartaric-acid-based bath is also an environmentally friendly plating bath.