Microstructure and magnetic properties of FePt/MgO multilayers deposited by RF magnetron sputtering  

作　　者：Xiaoli Li Fang Wang Fengxian Jiang Xiaohong Xu Haishun Wu 

机构地区：[1]School of Chemistry and Materials Science, Shanxi Normal University, Linfen 041004, China [2]College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China

出　　处：《Journal of University of Science and Technology Beijing》2008年第2期173-177,共5页北京科技大学学报（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China (No.10574085);the Opening Foundation of the Key Laboratory of Shanxi Province (200503010);the Key Project of the Ministry of Education of China (No.207020).

摘　　要：FePt （50 nm） and [FePt（a nm）/MgO（b nm）5/glass （a=1, 2, 3; b=1, 2, 3） films were prepared by radio frequency （RF） magnetron sputtering technique, and then were annealed at 600℃ for 30 min. The effect of MgO layer thickness on the structures and magnetic properties of the FePt/MgO multilayers was investigated. The coercivities and inter-grain interactions of the FePt/MgO films were decreased, yet the degree of （001） texturing drastically increased with the increase in MgO layer thickness when the FePt layer thickness was fixed. Thus, the FePt/MgO films with appropriate coercivities, high perpendicular anisotropy, and weak intergrain interactions were obtained by controlling the MgO layer thickness. Overall, these results indicate that the FePt/MgO nanostructured films are promising candidates for future high-density perpendicular recording media.FePt （50 nm） and [FePt（a nm）/MgO（b nm）5/glass （a=1, 2, 3; b=1, 2, 3） films were prepared by radio frequency （RF） magnetron sputtering technique, and then were annealed at 600℃ for 30 min. The effect of MgO layer thickness on the structures and magnetic properties of the FePt/MgO multilayers was investigated. The coercivities and inter-grain interactions of the FePt/MgO films were decreased, yet the degree of （001） texturing drastically increased with the increase in MgO layer thickness when the FePt layer thickness was fixed. Thus, the FePt/MgO films with appropriate coercivities, high perpendicular anisotropy, and weak intergrain interactions were obtained by controlling the MgO layer thickness. Overall, these results indicate that the FePt/MgO nanostructured films are promising candidates for future high-density perpendicular recording media.

关 键 词：FePt/MgO multilayer COERCIVITY perpendicular anisotropy inter-grain interaction 

分 类 号：TG14[一般工业技术—材料科学与工程]