同步辐射原位磁场研究平台及磁性纳米点阵研究

项目名称： 同步辐射原位磁场研究平台及磁性纳米点阵研究

项目编号： No.11475251

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 王勇

作者单位： 中国科学院上海应用物理研究所

项目金额： 86万元

中文摘要： 磁性材料在纳米尺度下表现出非常丰富的物理特性，如磁涡旋、磁近邻效应和交换偏置等，这些物理特性与材料的电子结构特别是自旋结构密切相关，对其进行研究不仅可以深入认识磁性机理，同时也为提高自旋电子器件的功能和品质提供了有力的工具。同步辐射磁二色和磁成像技术是研究自旋结构的重要手段，世界上大多数同步辐射的磁学线站都具备原位磁场和低温环境。本项目拟基于上海光源软X射线谱学显微线站，发展原位磁场和低温环境下的XMCD、XMLD和扫描透射显微技术，为用户提供一个具备元素分辨能力的磁结构和磁成像的同步辐射磁性研究平台。同时结合上海光源干涉光刻分支线站，对磁性纳米点阵中的若干前沿问题开展研究，如磁涡旋极性与手征性的反转、控制，反铁磁涡旋的交换偏置等，探索其在纳米尺度下的磁性机理，微观结构和宏观性能之间的关系，力争做出一些原创的、有特色的成果。

中文关键词： 同步辐射；软X射线；X射线成像；磁性薄膜；纳米材料结构

英文摘要： Magnetic materials demostrate abundant physics characteristics in nano scale, such as magnetic vortex, magnetic neighbour effect and exchange bias, et al. These characteristics are relevent to the electron structure, especially the spin structure, in materials. Research on the characteristics can not only help to understand the magnetic mechanism, but also provide a powerful tool for improving the function and quality of spin electrons devices. Synchrotron based x-ray dichroism and magnetic imaging are important methods in study on the spin structure. In worldwide synchrotrons, most of the magnetic beamlines can provide the in-situ magnetic and cryo environment. In this project, we plan to develop the XMCD, XMLD and STXM with in-situ magnetic and cryo environment based on the soft x-ray spectromicroscopy beamline in SSRF, and provide a synchrotron magnetic platform with the abilities of element resolved magnetic probing and imaging. In combination with the x-ray interference lithography beamine, researches will be performed focused on several scientific frontier problems on magnetic nano dot arrays, for example, the reversal and control of the polarity and chirality of magnetic vortex, exchange bias field in antiferromagnetic vortex. We will explore the magnetic mechanism of magnetic vortex in nano scale and the relationship between micro-structure and macro-function, and make great efforts to do some original and characteristic work.

英文关键词： Synchrotron;Soft x-ray;X-ray imaging;magnetic film;Nano materials structure