项目名称: 铁磁共振MExFM原子分辨率磁交换力检测成像研究
项目编号: No.61274103
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 无线电电子学、电信技术
项目作者: 李艳君
作者单位: 中北大学
项目金额: 80万元
中文摘要: 电子自旋对原子级别纳米构造体磁性质的理解和电子自旋器件的研制是极为重要的。磁交换力显微镜(MExFM)是测量原子磁矩相互作用力的一种重要手段,但是这种手段不能分离表面形貌和自旋信息。本研究目的是利用铁磁共振和我们已开发的原子分辨率力显微镜分离试料表面形貌信息和自旋信息。研究目标是从理论和实验上确立测量磁交换力的条件,研究磁性材料表面的物理化学性质。这需要解决磁性探针制作以及铁磁共振原子成像等关键问题,在实验和理论上论证自旋铁磁成像与磁性探针针尖的关系。通过揭示自旋材料表面原子的性质,更深入的理解原子级纳米结构的磁作用力和磁现象,研制出新一代电磁元件的新型自旋磁性纳米材料。上述研究成果可以促进对原子级磁性材料机能的理解以及磁性相关科学领域的进步,特别是对自旋电子元件的发展有很大的促进作用,是新世纪高度信息化社会不可缺少的测量技术。
中文关键词: 电子自旋;原子力显微镜;磁交换力显微镜;;
英文摘要: Electron spin interactions play an important role in elucidating properties of atomic-scale nano-structures. Magnetic exchange force microscopy (MExFM), as a novel method to measuring the spin interaction, has a disadvantage that it cannot directly separate topography and spin information. Purpose of this research is to find a new method to solve this problem by direct observation of the magnetic exchange force utilizing the home-built atomic force microscopy (AFM) based on the ferromagnetic resonance principle (FMR). The objective is to discover physical and chemical properties of the magnetic materials by deciding the optimization of measuring magnetic exchange force theoretically and experimentally. In order to achieve this objective, some key issues such as magnetic probe manufacture, atomic resolution FMR imaging and their relationship have to be established. By clarifying the properties of surface spin and further understanding the magnetic phenomenon for the atomic nano-structure, we can develop a new generation novel spin magnetic material which can replace the traditional electric components. This achievement is crucial for understanding the properties of atomic magnetic materials and progress of the related magnetic fields. It can promote the development of the spintronics devices, and also an indispen
英文关键词: Spin;AFM;MExFM;;