Magnetic properties of a Pt/Co_2 FeAl/MgO structure with perpendicular magnetic anisotropy  

作　　者：李晓其 徐晓光 王圣 吴勇 张德林 苗军 姜勇 

机构地区：[1]State Key Laboratory for Advanced Metals and Materials,School of Materials Science and Engineering,University of Science and Technology Beijing

出　　处：《Chinese Physics B》2012年第10期446-450,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 50831002,50971025,51071022,and11174031);the National Basic Research Program of China (Grant No. 2012CB932702);the Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT);the Beijing Nova Program (Grant No. 2011031);the Beijing Municipal Natural Science Foundation,China (Grant No. 2102032);the Fundamental Research Funds for the Central Universities

摘　　要：Microstructures and magnetic properties of Ta/Pt/Co 2 FeAl（CFA）/MgO multilayers are studied to understand perpendicular magnetic anisotropy（PMA） of half-metallic full-Heusler alloy films.PMA is realized in a 2.5-nm CFA film with B2-ordered structure observed by a high resolution transmission electron microscope.It is demonstrated that a high quality interface between the ferromagnetic layer and oxide layer is not essential for PMA.The conversions between in-plane anisotropy and PMA are investigated to study the dependence of magnetic moment on temperature.At the intersection points,the decreasing slope of the saturation magnetization（M s） changes because of the conversions.The dependence of M s on the annealing temperature and MgO thickness is also studied.Microstructures and magnetic properties of Ta/Pt/Co 2 FeAl（CFA）/MgO multilayers are studied to understand perpendicular magnetic anisotropy（PMA） of half-metallic full-Heusler alloy films.PMA is realized in a 2.5-nm CFA film with B2-ordered structure observed by a high resolution transmission electron microscope.It is demonstrated that a high quality interface between the ferromagnetic layer and oxide layer is not essential for PMA.The conversions between in-plane anisotropy and PMA are investigated to study the dependence of magnetic moment on temperature.At the intersection points,the decreasing slope of the saturation magnetization（M s） changes because of the conversions.The dependence of M s on the annealing temperature and MgO thickness is also studied.

关 键 词：HALF-METALLIC perpendicular magnetic anisotropy 

分 类 号：O611.3[理学—无机化学]