Local Spectroscopy of Ferromagnetic/Superconductor Nanostructures

铁磁/超导体纳米结构的局部光谱学

• 批准号: 0139936
• 负责人: Venkat Chandrasekhar
• 金额: $ 19.5万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-15 至 2005-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0139936&HistoricalAwards=false
• 关键词: Local; Spectroscopy; Ferromagnetic; Superconductor; Nanostructures

It is proposed to conduct local spectroscopic and potentiometric measurements on submicron scale devices to investigate some of the most interesting issues in mesoscopic physics. The tools that will be developed will enable a host of new experimental investigations that would not be possible by any other means.The probe to be used in these studies is scanning tunneling microscopy (STM), one that has been used extensively in recent years to investigate structures on the nanometer scale. The requirements of the proposed experiments necessitate the assembly of a number of experimental techniques in one experimental tool, which has not been done before. After assembly of the instrument, the experiments to be performed involve imaging the magnetic vortices created in a superconducting film by an external magnetic field, and by the magnetic field emanating from ferromagnetic particles embedded in the film. The project will entail a close collaboration with Professor Herve' Courtois' group at the CRTBT in Grenoble, France.Ferromagnets are becoming increasingly important as components of a wide variety of potentially useful devices. These experiments seek to answer a number of fundamental questions regarding the properties of ferromagnets on the nanometer scale, and their interactions with other materials such as superconductors. Given the increasing importance of scanning probe microscopies in investigating and characterizing the properties of nanoscale systems, the students involved in this project will be well-trained in techniques that will be useful in their future careers, whether those careers are in industry, academia, or government laboratories.

建议在亚微米级设备上进行局部光谱和电位测量，以研究介观物理中一些最有趣的问题。将开发的工具将能够进行许多其他方法无法实现的新实验研究。这些研究中使用的探针是扫描隧道显微镜（STM），近年来被广泛使用的一种研究纳米尺度的结构。所提出的实验的要求需要将多种实验技术组装在一个实验工具中，这是以前从未做过的。仪器组装完毕后，要进行的实验包括对超导薄膜中由外部磁场以及嵌入薄膜中的铁磁颗粒发出的磁场产生的磁涡流进行成像。该项目将需要与法国格勒诺布尔 CRTBT 的 Herve' Courtois 教授小组进行密切合作。铁磁体作为各种潜在有用设备的组件变得越来越重要。这些实验旨在回答有关纳米尺度铁磁体特性及其与超导体等其他材料相互作用的许多基本问题。鉴于扫描探针显微镜在研究和表征纳米级系统特性方面的重要性日益增加，参与该项目的学生将接受良好的技术培训，这些技术将在他们未来的职业生涯中发挥作用，无论这些职业是在工业界、学术界还是工业界。政府实验室。