添加硫酸锰对化学镀Co-Fe-P合金结构和磁性能的影响

Effect of Adding MnSO_4 on Structure and Magnetic Performances of Co-Fe-P Alloy by Electroless Deposition

借助扫描电镜、能谱分析、X射线衍射和振动样品磁强计研究了添加硫酸锰对Co-Fe-P合金沉积速率、结构和磁性能的影响。结果表明,少量的硫酸锰有利于Co-Fe-P镀层的沉积,但过量时会降低沉积速率。当镀液中添加的硫酸锰浓度小于0.02mol·L-1时对镀层组成几乎没有影响,但随着其浓度进一步增大至0.04mol·L-1,镀层组成发生显著的变化。硫酸锰对该镀层具有整平作用,而且可使镀层中颗粒细化;硫酸锰有利于镀层形成非晶或微晶态结构。硫酸锰还可以改善Co-Fe-P合金膜的磁性能。

The effects of adding of MnSO4 on the deposition rate, the structure and the magnetic performances of the Co-Fe-P deposit were investigated by scanning electron microscope （SEM）, energy dispersive spectroscopy （EDS）, X-ray diffraction （XRD） and vibrating sample magnetometer （VSM）. The results show that adding of a little quantity of MnSO4 in the plating solution is beneficial to deposition of Co-Fe-P, but over quantity will reduce the plating rate. As the concentration of MnSO4 in the plating solution is lower than 0.02 mol·L^-1, it basically does not effect the deposit composition. But the concentration of MnSO4 increases from 0.02 mol·L^-1 to 0.04 mol·L^-1, the deposit composition is obviously changed. The additive agent MnSO4 makes the grain size of the deposit fine, and levels the deposit surface. The agent favors to form an amorphous or micro-crystalline phase structure, and can improve the deposit magnetic performances.