Abstract Nano-flake SmCo5 powders with typical flake thickness of 200 nm were prepared by high energy ball milling using Oleic Acid (OA) as a surfactant. In order to remove the surfactant, the as-milled powders were exposed to pulse cold plasma of argon. The effects of the plasma parameters on residual surfactant content and magnetic properties of the resulting powder were investigated. Partial (62.5 at. %) surfactant removal was observed by XPS after treatments of 4 h at 150 Watt average power under an argon pressure of 300 mTorr. In addition, the cold plasma cleaning process led to a little bit of increase of oxygen on the surface. Demagnetization measurements revealed a slight decrease of the magnetic performance after plasma treatment. These results indicate that pulse cold plasma is an effective way for surfactant removal without morphological change and magnetic property degradation of the SmCo5 nano-flakes.

中文翻译：

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表面活性剂辅助球磨制备 SmCo5 纳米薄片表面碳的冷等离子体还原

摘要 以油酸（OA）为表面活性剂，通过高能球磨制备了典型片状厚度为200 nm的纳米片状SmCo5粉末。为了去除表面活性剂，将研磨后的粉末暴露于氩的脉冲冷等离子体中。研究了等离子体参数对所得粉末的残余表面活性剂含量和磁性能的影响。在 300 毫托的氩气压力下以 150 瓦的平均功率处理 4 小时后，通过 XPS 观察到部分（62.5 原子％）表面活性剂去除。此外，冷等离子清洗工艺导致表面氧气略有增加。退磁测量显示等离子处理后磁性能略有下降。