(Pt_3Co)_(1-x)Ni_x合金薄膜的结构、磁性和磁光特性研究  

THE STUDY OF THE STRUCTURAL,MAGNETIC AND MAGNETO OPTICAL PROPERTIES OF (Pt_3Co)_(1-x)Ni_x ALLOY FILMS 

作　　者：周健[1] 荀坤[1] 沈德芳[1] 夏国强[2] 郑玉祥[2] 陈良尧[2] 

机构地区：[1]中国科学院上海冶金研究所,上海200050 [2]复旦大学物理系,上海200433

出　　处：《物理学报》1999年第S1期217-223,共7页Acta Physica Sinica

基　　金：国家自然科学基金!( 批准号:69777016)

摘　　要：采用直流溅射的方法，在Ｐｔ３Ｃｏ 合金靶上加贴Ｎｉ 片，把（Ｐｔ３Ｃｏ）１ － ｘＮｉｘ 合金薄膜中非磁性原子与磁性原子的比率从３∶１ 调制到１∶１ ．通过高角Ｘ 射线衍射谱和磁性的研究，发现〈１１１〉织构至少在０－３３ —０－５０ 的Ｎｉ 成分范围内不是引起垂直磁各向异性的主要原因．在此基础上研究了（Ｐｔ３Ｃｏ）１ － ｘＮｉｘ 合金薄膜的磁光特性．研究表明，适量Ｎｉ 合金化（ ｘ ＝ ０－４３） 可以获得较低的（Ｐｔ３Ｃｏ）１ － ｘＮｉｘ 合金薄膜居里温度，同时保持较高的垂直磁各向异性、较大的矫顽力和蓝波长下较高的Ｋｅｒｒ 转角，从而为ＰｔＣｏＮｉ 合金薄膜的实用化提供了实验参考．The ratio of non\|magnetic to magnetic atoms was adjusted from 3∶1 to 1∶1 within the (Pt\-3Co) 1-x Ni x system by sticking Ni chips to the Pt\-3Co target. X\|ray diffraction and magnetic results showed that perpendicular magnetic anisotropy was not caused by 〈111〉 texture at least in the Ni content range of 0 33—0 50. Furthermore, the effect of the Ni addition to the CoPt\-3 alloy films on their magnetic and magneto\|optical properties were investigated. The result shows that satisfactory Curie temperature T C, cohercivity H c and Kerr rotation can be simultaneously obtained by selecting suitable Ni content ( x =0.43) in the (Pt\-3Co) 1-x Ni x system. This work provides an experimental basis for the application of PtCoNi alloy films.

关 键 词：合金薄膜 磁光特性 居里温度 垂直磁各向异性 合金化 多层膜 矫顽力 磁性原子 磁滞回线 晶格常量 

分 类 号：TG132[一般工业技术—材料科学与工程]