Magnetic Microscopy Using Superconducting Quantum Interference Devices

使用超导量子干涉装置的磁显微镜

• 批准号: 9218373
• 负责人: Frederick Wellstood
• 金额: $ 21万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-05-01 至 1996-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9218373&HistoricalAwards=false
• 关键词: Magnetic; Microscopy; Using; Superconducting; Quantum

Project Description (Technical): This project will develop a new measuring instrument, called a magnetic flux microscope, which is based on a SQUID (superconducting quantum interference device) sensor. The objective is to obtain images of magnetic fields near surfaces with a resolution at the micron length scale. The instrument should be able to scan an area one centimeter on a side, resolve features as small as 1 mm and sense magnetic fields as small as 10 December 22, 1992picoTesla. The instrument will be able to sense currents as small as 12 picoAmperes. The new instrument will be used in investigations of superconductivity, and will address issues such as the pinning and motion of individual vortices. In addition, the instrument will be used to obtain images of a range of magnetic materials, as well as working microcircuits. Project Description (Non-Technical): This project continues the instrumental revolution based on surface microscopy techniques such as scanning tunneling microscopy and atomic force microscopy. In this case a new surface microscopy is being developed to sense not atomic positions but the magnetic fields produced by the atoms and molecules. It will sense surface atoms and subsurface atoms as well. The sol-called magnetic flux microscope will be used to study superconductivity, magnetism and will also be used to sense current flow in work microcircuits. The technique should provide new information about the fundamental aspects of superconductivity and magnetism and will provide a new diagnostic tool to improve microcircuit performance.

项目描述（技术）：本项目将开发一种基于SQUID（超导量子干涉器件）传感器的新型测量仪器，称为磁通量显微镜。目标是获得具有微米长度尺度分辨率的近表面磁场图像。该仪器应该能够扫描一个边长为一厘米的区域，分辨小到1毫米的特征，并感知小到1992年12月22日10皮特斯拉的磁场。该仪器将能够感应小至12皮安的电流。新仪器将用于研究超导性，并将解决诸如单个漩涡的固定和运动等问题。此外，该仪器将用于获得一系列磁性材料的图像，以及工作的微电路。项目描述（非技术）：该项目继续基于表面显微镜技术的仪器革命，如扫描隧道显微镜和原子力显微镜。在这种情况下，一种新的表面显微镜正在被开发出来，它不仅能探测原子的位置，还能探测原子和分子产生的磁场。它也能感知表面原子和亚表面原子。这种被称为磁通量显微镜的仪器将用于研究超导性、磁性，也将用于检测工作微电路中的电流。该技术将为超导性和磁性的基本方面提供新的信息，并将为改善微电路性能提供新的诊断工具。