Local Spectroscopy of Ferromagnetic/Superconductor Nanostructures

建议对亚微米尺度的器件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。将开发的工具将使一系列新的实验研究，这将是不可能的任何其他measurement.The探针在这些研究中使用的是扫描隧道显微镜（STM），近年来已被广泛用于研究纳米尺度上的结构。所提出的实验的要求需要在一个实验工具中组装一些实验技术，这是以前没有做过的。在组装仪器之后，要进行的实验涉及通过外部磁场以及通过从嵌入膜中的铁磁颗粒发出的磁场来对超导膜中产生的磁涡旋进行成像。该项目将需要与法国格勒诺布尔CRTBT的埃尔韦教授“Courtois”小组密切合作。铁磁体作为各种潜在有用设备的组成部分正变得越来越重要。这些实验试图回答一些关于纳米尺度上铁磁体性质的基本问题，以及它们与超导体等其他材料的相互作用。鉴于扫描探针显微镜在调查和表征纳米级系统的特性方面越来越重要，参与该项目的学生将在他们未来的职业生涯中得到良好的技术培训，无论这些职业是在工业，学术界还是政府实验室。

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.