中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 16 No. 3 June 2006 |
YU Geng-hua(俞耿華)2, CAI Chao(蔡 超)3, ZHANG Jian-qing(張鑒清)2
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Department of Chemistry, Zhejiang University, Hangzhou 310027, China;
3. Key Laboratory of Energy Resource and Chemical Engineering, Ningxia University, Yinchuan 750021, China）
Abstract: The electroplating behavior of nanocrystalline CoNiFe soft magnetic thin film with high saturation magnetic flux density (Bs＞2.1 T) and low coercivity (Hc) was investigated using cyclic voltammetry and chronoamperometry methods in conjunction with the scanning electron microscopy (SEM/EDX). The results show that, under the experimental conditions, the co-deposition of CoNiFe film behaves anomalously due to the atomic radii of iron series elements following the order of rFe＞rCo＞rNi. In the case of lower electroplating current density, the co-deposition of CoNiFe film follows a 3-D progressive nucleation/growth mechanism, while in the case of higher electroplating current density, which follows a 3-D instantaneous nucleation/growth mechanism. Meanwhile, the change of nucleation mechanism of CoNiFe film with electroplating current density was interpreted theoretically in the light of quantum chemistry.
Key words: nanocrystalline CoNiFe film; soft magnetism; pulse-reverse electroplating; anomalous co-deposition; electrocrystalliza- tion mechanism
