Electroplating of Dysprosium, Electrochemical Investigations, and Study of Magnetic Properties
Electroplating of Dysprosium, Electrochemical Investigations, and Study of Magnetic Properties
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镝电镀、电化学研究和磁性能研究
DOI：
10.1149/1.2172548
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发表时间：
2006
影响因子：
3.9
通讯作者：
G. Bayreuther
中科院分区：
文献类型：
--
作者：
J. Lodermeyer;M. Multerer;M. Zistler;S. Jordan;H. Gores;W. Kipferl;E. Diaconu;M. Sperl;G. Bayreuther
研究了镝在几种非水溶液和离子液体中的电镀。金属镝用作阳极材料，几种金属和具有真空沉积金层的硅晶片用作阴极材料。成功地从二甲基甲酰胺基溶液中电镀出高库仑效率的镝。通过从非水电解质将铝层电镀到镝上，有效地保护所得镝层免于与水和来自空气的氧气反应。通过电化学方法研究所有过程，所述电化学方法包括循环伏安法、计时电流法、计时电位法，并且借助于与Autolab PGSTAT 30偶联的电化学石英微量天平，所述Autolab PGSTAT 30由来自Eco Chemie B. V.的GPES软件控制，荷兰乌得勒支。应用Izutsu开发的非水参比电极;通过对他的原始提议进行轻微修改来保持低的扩散电位。用X射线荧光光谱法验证了Dy的电镀。超导量子干涉装置的磁性测量也证实了金属Dy的存在，其在5 K下显示出铁磁矩。
Electroplating of dysprosium from several nonaqueous solutions and from an ionic liquid was studied. Dysprosium metal was used as the anode material, and several metals and a silicon wafer with a vacuum-deposited gold layer were used as cathode materials. Dysprosium was successfully electroplated from dimethylformamide-based solutions with high coulombic efficiency. The resulting dysprosium layer was effectively protected vs reactions with water and oxygen from air by electroplating an aluminum layer onto dysprosium from a nonaqueous electrolyte. All processes were investigated by electrochemical methods including cyclic voltammetry, chronoamperometry, chronopotentiometry, and with the help of an electrochemical quartz microbalance coupled to an Autolab PGSTAT30 controlled by the GPES software from Eco Chemie B.V., Utrecht, The Netherlands. A nonaqueous reference electrode developed by Izutsu was applied; the diffusion potential was kept low by a slight modification of his original proposal. X-ray fluorescence spectroscopy was used to verify electroplating of Dy. The presence of metallic Dy was also confirmed by superconducting quantum interference device magnetometry which showed a ferromagnetic moment at 5 K.