Structures and properties of [CoPt/Ag]_(n) multilayer films  

作　　者：XU Xiaohong YANG Zhiguang WU Haishun 

机构地区：[1]School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, China School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, China School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, China

出　　处：《Science China(Technological Sciences)》2005年第2期214-219,共6页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.20341005);the Natural Science Foundation of Shanxi Province(Grant No.20041032).

摘　　要：The magnetic properties and structures of [CoPt/Ag]n multilayer films deposited by DC magnetron sputtering have been studied. During the deposited process, two kinds of deposited sequences, that is Ag layer (FDAG) first deposited or CoPt layer (FDCP) first deposited, have been chosen. The results show that the microstructures and coercivities were strongly influenced by the deposited sequence and the thickness of films. The coercivities of [Ag/CoPt]n with FDAG are obviously higher than those of [CoPt/Ag]n with FDCP. Especially, when the thickness of films is 8 nm, the difference of coercivities between the FDAG film and the FDCP film is the largest. It is possibly because Ag plays a role of underlayer in FDAG multilayers, which can induce both the transformation from fcc to fct and the oriented growth along c-axis. In addition, δ M curves reveal that the [CoPt/Ag]8 multilayer film has a lower intergrain interaction than the CoPt/Ag bilayer film.The magnetic properties and structures of [CoPt/Ag]n multilayer films deposited by DC magnetron sputtering have been studied. During the deposited process, two kinds of deposited sequences, that is Ag layer (FDAG) first deposited or CoPt layer (FDCP) first deposited, have been chosen. The results show that the microstructures and coercivities were strongly influenced by the deposited sequence and the thickness of films. The coercivities of [Ag/CoPt]n with FDAG are obviously higher than those of [CoPt/Ag]n with FDCP. Especially, when the thickness of films is 8 nm, the difference of coercivities between the FDAG film and the FDCP film is the largest. It is possibly because Ag plays a role of underlayer in FDAG multilayers, which can induce both the transformation from fcc to fct and the oriented growth along c-axis. In addition, δ M curves reveal that the [CoPt/Ag]8 multilayer film has a lower intergrain interaction than the CoPt/Ag bilayer film.

关 键 词：[CoPt/Ag]n MULTILAYER films  deposition sequence  magnetic properties  X-ray diffraction. 

分 类 号：TH[机械工程]