溅射制备Pt_(1-x)Co_x(x=0.2～0.4)合金膜的基本光学和磁光常数  

OPTICAL AND MAGNETO OPTICAL CONSTANTS OF Pt 1- x Co x (x=0.2～0.4) ALLOY FILMS PREPARED BY SPUTTERING ALLOY TARGET

作　　者：荀坤[1,2] 刘铸[1,2] 周健[1,2] 郑玉祥 沈德芳[1,2] 陈良尧[1,2] 

机构地区：[1]中国科学院上海冶金研究所 [2]复旦大学物理系

出　　处：《功能材料与器件学报》1998年第4期250-256,共7页Journal of Functional Materials and Devices

基　　金：国家自然科学基金

摘　　要：在光子能量为１．５ｅＶ～４．８ｅＶ的范围内，测量了用溅射合金靶方法制备的易磁化方向垂直于膜面的Ｐｔ１－ｘＣｏｘ（ｘ＝０．２～０．４）合金膜的光学常数和磁光常数。该合金膜的光学常数对成份极不敏感。磁光常数随Ｃｏ成份的增加而增加。克尔转角在光子能量为４．２ｅＶ附近的峰值随Ｃｏ成份的增大可用费米面附近ｄ电子轨道态密度和Ｐｔ５ｄ电子极化的增大来解释。本文还讨论了Ｐｔ１－ｘＣｏｘ合金膜的本征和潜在品质因子。The optical and magneto-optical constants of Pt 1- x Co x (x=0.2～0.4) alloy films with perpendicular magnetic anisotropy prepared by sputtering alloy target were measured at photon energy 1.5～4.8eV. The optical constants of the alloy films were extremely insensitive to its component. Their magneto-optical constants increased with the Co content. The increase of the Kerr rotation peak at 4.2eV with the content of Co can be attributed to the increases of the d band state density of Co near Fermi level and the polarization of Pt 5d electrons. The potential figure of merit of the alloy films was also discussed.

关 键 词：磁光克尔效应 光学常数 铂钴合金 合金膜 

分 类 号：O484.4[理学—固体物理] O436[理学—物理]