水溶液中Sm-Co薄膜的制备及其磁学性质  

Preparation and Magnetic Properties of Sm-Co Film from Aqueous Solution

作　　者：龙雄飞[1] 郭光华[1] 李新华[1] 夏庆林[1] 张金方[1] 

机构地区：[1]中南大学物理科学与技术学院,长沙410083

出　　处：《材料导报》2013年第16期24-26,38,共4页Materials Reports

基　　金：国家自然科学基金(60571043);国家教育部博士点基金(20120162110020)

摘　　要：在以甘氨酸为络合剂的水溶液中,利用恒电位技术成功制备出了高Sm含量(质量分数为62.2%)的Sm-Co合金薄膜。循环伏安曲线表明,甘氨酸在电化学沉积Sm-Co合金薄膜的过程中具有重要作用。络合物[CoⅡ-SmⅢ(Gly-)2(HGly±)]3+的形成有利于Sm和Co在相对低电位下的共沉积。X射线衍射仪(XRD)分析结果表明,镀态合金膜为非晶态,经过退火处理后,合金膜由非晶态转化为多晶态结构,出现了永磁相Sm2Co17,合金膜的矫顽力明显增大。Sm-Co films with high Sin content （62. 2 wt%） were electrodeposited from the aqueous solution con- taining glycine as a complexing agent by potentiostat technology. The measurements of cyclic voltammetry showed that the glycine plays a vital role in the electrodeposition of Sm-Co films. The forming of stable complex [CoⅡ-SmⅢ- （Gly-）2 （HGly± ）]3＋ facilitates the codeposition of Sin with Co at relatively low potential. The X-ray diffraction showed that the as-deposited Sm-Co films were amorphous. After annealing process, the films transformed into crys- talline state and the permanent Sin2 Co17 phase was formed, which enhanceed the coercivity of the films significantly.

关 键 词：Sm-Co合金膜 电沉积 电化学行为 水溶液 磁学性质 

分 类 号：TB34[一般工业技术—材料科学与工程] O484.43[理学—固体物理]