Collaborative Research: Microwave Auto-Oscillators Driven by Pure Spin Currents

合作研究：纯自旋电流驱动的微波自动振荡器

• 批准号: 1305586
• 负责人: Sergei Urazhdin
• 金额: $ 27万
• 依托单位: Emory University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-15 至 2016-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1305586&HistoricalAwards=false
• 关键词: Collaborative; Research; Microwave; Auto; Oscillators

The objective of this program is to develop and study the characteristics of microwave magnetic auto-oscillators driven by pure spin currents.The intellectual merit is a deeper understanding of phenomena induced in nanoscale magnetic systems by spin currents, which will be facilitated by the new, previously inaccessible structures and geometries of devices driven by spin currents, by the development of advanced magnetic characterization techniques - micro-focus Brillouin Light Spectroscopy and x-ray dichroism microscopy, and by the advances in theoretical understanding of nanoscale magnetic systems.The broader impacts are enhanced competitiveness of US science/technology, training of specialists for the electronics industry, and general public education. Namely, a new class of microwave auto-oscillators developed in this program will help maintain US leadership in microwave electronics. Undergraduate and graduate students will be exposed to the modern methods of fabrication and characterization of spintronic nanostructures, and will interact with the leading scientists. Outreach activities including lectures and demonstrations on nanoscience and nanotechnology tailored for K-12 teachers and students will scientifically inform the general public. Student education will be enhanced through the incorporation of theoretical and experimental methods of nanotechnology and spintronics into the graduate and undergraduate curricula.The main transformative aspect of the proposal will be the development of a qualitatively new type of active spin-based devices where spin currents will be used directly, without being accompanied by charge currents, opening the possibilities for using new types of materials and device geometries.

本项目的目标是开发和研究纯自旋电流驱动的微波磁自动振荡器的特性，其智力价值是更深入地理解自旋电流在纳米磁系统中引起的现象，这将有助于以前无法实现的新结构和自旋电流驱动器件的几何形状，先进的磁性表征技术-微聚焦布里渊光谱学和X射线二向色性显微镜的发展，以及对纳米磁性系统的理论理解的进步。更广泛的影响是增强了美国科学/技术的竞争力，培训电子行业的专家，并进行一般公众教育。也就是说，在这个计划中开发的一类新的微波自动振荡器将有助于保持美国在微波电子学方面的领导地位。 本科生和研究生将接触到自旋电子纳米结构的制造和表征的现代方法，并将与领先的科学家互动。外展活动包括为K-12教师和学生量身定制的纳米科学和纳米技术讲座和演示，将向公众提供科学信息。通过将纳米技术和自旋电子学的理论和实验方法纳入研究生和本科生课程，将加强学生教育。该提案的主要变革方面将是开发一种新型的有源自旋器件，其中将直接使用自旋电流，而不伴随电荷电流，打开了使用新型材料和器件几何形状的可能性。