Abstract Fe50Pt50 thick-films were electroplated on a Ta substrate using a direct current, and we evaluated the effect of Na ion concentration in plating baths on the magnetic properties of the annealed films. With increasing NaCl content from 2 to 30 g/L, the coercivity of the annealed Fe50Pt50 films increased from 700 kA/m to approximately 900 kA/m. For obtaining further experimental evidence for the increase in the coercivity, we employed trisodium citrate instead of NaCl as an additive in the plating bath. Consequently, as the addition of the trisodium citrate as well as NaCl increased the coercivity, we concluded that a plating bath with high Na ion concentration is effective to obtain the Fe-Pt thick-films with high coercivity.

中文翻译：

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镀液中Na离子对电镀Fe-Pt薄膜磁体矫顽力的影响

摘要 Fe50Pt50 厚膜使用直流电电镀在 Ta 基体上，我们评估了镀液中 Na 离子浓度对退火膜磁性能的影响。随着 NaCl 含量从 2 g/L 增加到 30 g/L，退火后的 Fe50Pt50 薄膜的矫顽力从 700 kA/m 增加到大约 900 kA/m。为了获得矫顽力增加的进一步实验证据，我们使用柠檬酸三钠代替 NaCl 作为电镀浴中的添加剂。因此，由于柠檬酸三钠和 NaCl 的添加增加了矫顽力，我们得出结论，具有高 Na 离子浓度的镀浴可有效获得具有高矫顽力的 Fe-Pt 厚膜。