Electrodeposition and characterization of nanocrystalline CoNiFe films

摘要

Nanocrystalline Co_(45)Ni_(10)Fe_(24) films have been fabricated using cyclic voltammetry technique from the solutions containing sulfate, then characterized by scanning electron microscopy, X-ray diffraction and vibrating sample magnetometer. Meanwhile, Electrochemical Impedance Spectroscopy technique has been employed to probe into the nucleation/growth behavior of Co_(45)Ni_(10)Fe_(24) films. The results show that, the obtained Co_(45)Ni_(10)Fe_(24) film possesses low coercivity of 973.3 A/m and high saturation magnetic flux density of 1.59×10~5 A/ m. Under the experimental conditions, the nucleation/growth process of Co_(45)Ni_(10)Fe_(24) films is mainly under activation control. With the increase of the applied cathodic potential bias, the charge transfer resistance for CoNiFe deposition decreases exponentially.