Microstructure and magnetic properties of electrodeposited Gd-Co alloy films

作     者：LAI Heng LI Jiaxin ZHOU Weichao ZHUANG Bin WU Xiaoping HUANG Zhigao 

作者机构：Shool of Physics and Optoelectronics Technology Fujian Normal University Fuzhou 350007 China Department of Chemistry Fuzhou University Fuzhou 350002 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2008年第27卷第6期

页      面：586-590页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：financially supported by the Science Foundation of the Educational Department of Fujian Prov-ince (No. 2008F5021) the Natural Science Foundation of Fujian Province (No. A0510013) the National Natural Science Foundation of China (No. 60676055) 

主　　题：electrodeposited films Gd-Co alloys surface microstructure crystalline phase magnetic properties 

摘      要：Gd-Co alloy films were synthesized by potentiostatic electrolysis on Cu substrates in urea-acetamide-NaBr-KBr melt at 353 K. The electroreduction of Co^2＋ and Gd^3＋ was investigated by cyclic voltammetry. The reduction of Co^2＋ is an irreversible process. Gd^3＋ cannot be reduced alone, but it can be inductively co-deposited with Co^2＋. Both the Gd content and microstructure of the prepared Gd-Co alloy films can be controlled by the deposited potential. The content of Gd was analyzed using an inductively coupled plasma emission spectrometer （ICPES）, and the microstructure was observed by scanning electron micrograph （SEM）. The films were crystallized by heat-treatment at 823 K for 30 s in Ar atmosphere, and then were investigated by XRD. The hysteresis loops of the Gd-Co alloy films were measured by a vibrating sample magnetometer （VSM）. The experimental results reveal that the deposited Gd-Co alloy films are amorphous, while the annealing causes the samples to change from amorphous to polycrystalline, thus enhancing their magnetocrystalline anisotropy and coercivity. Moreover, the magnetic properties of the Gd-Co alloy films depend strongly on the Gd content.