Magnetic Properties and Heat-Treatment of Electrodeposited Sm-Co Alloy Films
Dense, adhesive and uniform Sm-Co alloy films were prepared by potentiostatic electrolysis on copper substrates in urea-acetamide-NaBr-KBr melt at 353K, which were observed by SEM. The electroreduction of Co<2+> and Sm<3+> was investigated by cyclic voltammetry. The reduction of Co<2+> is an irreversible process. Sm<3+> can not be reduced alone, but Sm-Co can be co-deposited by induced deposition. The films could be crystallized by heat- treatment at different temperature from 723 to 923K under Ar atmosphere. The annealed time was chosen as 30s. The phases of deposited and annealed films were investigated by XRD. The content of Sm was analyzed by Inductive Coupled Plasma Emission Spectrometer (ICPES). The hysteresis loops of the Sm-Co alloy films have been measured by Vibrating Sample Magnetometer (VSM). The experimental results reveal that, the heat-treatment has important influence on coercive field H<,c> and remanent squareness S of Sm- Co alloy films; the deposited Sm-Co alloy films are amorphous, while the annealed those become polycrystalline; in addition, the magnetocrystalline anisotropy and preferring orientation of films depend strongly on the contents of crystal phases.
Sm-Co alloy films annealing magnetic properties electrodeposition microstructure rare earths
Lai Heng(赖恒) Li Jiaxin(李加新) Zhuang Bin(庄彬) Chen Dan(陈丹) Huang Zhigao(黄志高)
Department of Physics, Fujian Normal University,Fuzhou 350007, China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
186-190
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）