利用界面磁耦合作用调控FePt基垂直记录材料的实用性能

本项目是针对超高密度磁硬盘或高精度磁编码器领域中的实用性关键问题、开发新型实用的FePt基磁记录材料所提出的一项应用基础研究。解决主要科学性问题：（1）通过材料的综合设计和界面控制，实现对FePt/Au垂直复合薄膜的实用性能（热稳定性和矫顽力）的调控；（2）在纳米尺度上表征FePt基垂直磁记录材料的界面微结构和磁结构，并弄清界面调控的作用机理。本项目拟在FePt/Au多层膜中引入反铁磁材料或软磁材料对其的界面磁耦合作用；同时，利用掺杂表面活性原子或晶格匹配原子对其界面微结构的改善作用，从而综合调控薄膜的实用性能（热稳定性和矫顽场）。此外，综合使用高分辨电子显微镜、角分辨X射线光电子能谱技术以及微磁模拟的方法表征上述薄膜的界面微结构和磁结构，以阐述上述界面调控的作用机理。

This project is a foundational researches which aim to solve the pragmatic properties of hard disk drives with ultrahigh density or magnetic encoder with high resolution, and to develop novel and pragmatic FePt based magnetic recording materials. The scientific problems should be solved are: (1) Realizing the manipulations on the pragmatic properties of FePt/Au perpendicular composite films; (2) exploring mechanism of interfacial manipulation by characterizing FePt based perpendicular recording materials on a nano scale. In this project, interfacial magnetic couplings (due to anti-ferromagnetic materials or soft magnetic materials) and microstructural modifications of doped surfactants or crystal-matched atoms are supposed to be introduced to comprehensively tune the pragmatic properties (thermal stability and coercivity). Meanwhile, HRTEM, angled resolved XPS, and micromagnetic simulation are supposed to characterize the interfacial microstructure and magnetic structure of the films, and to explore the mechanism of interfacial manipulation.