Collaborative Research: Signal Processing Devices Based on Spin-Torque Nano-Oscillators

合作研究：基于自旋力矩纳米振荡器的信号处理器件近年来，人们对纳米结构中电流诱导磁化动力学的理解取得了突破性进展，从而出现了一种新型的微波自旋力矩纳米振荡器源。这项合作研究计划的目标是创建实验原型，并开发基于自旋扭矩纳米振荡器的两种新型微波信号处理设备的操作理论：（i）超快宽带频谱分析仪;（ii）片上微波信号调制器。所提出的设备是基于一个新的振荡器的几何形状与两个？免费的？磁性层在这种几何结构中，自由层在彼此相反的方向上旋进，从而使所生成的微波信号的频率加倍。这种新颖的几何结构将为开发工作频率高达80千兆赫兹的基于微波炉的设备铺平道路。该计划的另一个目标是研究开发的纳米尺寸器件之间的无线片上和芯片到芯片通信的可能性，这将使它们能够在没有高电阻功率效率低下的电线互连的情况下交换和处理微波信号。智力优点：拟议的研究计划将对微波纳米自旋电子学领域产生变革性影响，并将导致开发具有无线通信能力的纳米级片上微波信号处理器件的新概念。这一变革性概念的发展可能会改变系统工程师对将单个纳米级器件集成到纳米自旋电子集成电路中的思考方式。这项研究也将促进我们对磁性纳米结构中自旋极化电流和动态磁化之间相互作用的物理理解。该方法是利用在加州大学欧文分校的实验组和在奥克兰大学的理论组之间的协同互动的全部好处。这一合作努力将通过与美国和欧洲领先的研究小组以及国内领先的工业合作伙伴的互动来加强，以实现微波纳米自旋电子学器件技术开发的突破。更广泛的影响：他提出的研究计划将以多种方式影响社会。该计划开发的新型微波片上纳米级信号处理器件将有助于保持美国在微波电子学领域的领导地位。一些本科生和研究生将接触到纳米科学和纳米技术的现代方法，并将与国内外领先的研究小组以及我们的工业合作伙伴进行互动。拟议的计划将为美国电子和磁记录行业准备有价值的专家，这些行业目前正在经历从微米到纳米尺度的快速过渡，并将加强美国的研究基础设施。为博士后研究人员特别辅导计划，教育他们撰写研究提案和组织合作研究，将为我们的博士后未来的独立科学生涯做好准备。推广活动（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）将有助于培养熟练的劳动力和科学知情的公众。拟议的计划还将对教育产生强烈的影响，因为计划参与者将纳米技术的理论和实验方法纳入研究生和本科大学课程。

Collaborative Research: Signal Processing Devices Based on Spin-Torque Nano-Oscillators Recent breakthroughs in understanding of current-induced magnetization dynamics in nano-structures have led to the emergence of a new type of microwave spin-torque nano-oscillatorssources. The goal of this collaborative research program is to create experimental prototypes and develop a theory of operation of two novel microwave signal-processing devices that are based on spin-torque nano-oscillators : (i) ultra-fast broadband spectrum analyzer;(ii) on-chip microwave signal modulator. The proposed devices are based on a new oscillator geometry with two ?free? magnetic layers. In this geometry, the free layers precess in directions opposite to each other, thus doubling the frequency of the generated microwave signal. This novel geometry will pave the way towards the development of oscillator-based devices with operation frequency of up to 80 gigahertz. Another goal of this program is to research the possibilities for wireless on-chip and chip-to-chip communications between the developed nano-sized devices, that will allow them to exchange and process microwave signals without high-resistance power-inefficient wire interconnects. Intellectual merit: The proposed research program will have a transformative impact on the field of microwave nano-spintronics, and will lead to the development of a new concept of nano-sized on-chip microwave signal processing devices with wireless communication capabilities. The development of this transformative concept could change the way system engineers think about integration of individual nano-scale devices into nano-spintronic integrated circuits. The proposed research will also advance our understanding of the physics of interactions between spin-polarized currents and dynamic magnetization in magnetic nanostructures. The approach is to use the full benefit of synergistic interaction between the experimental group at the University of California, Irvine and the theoretical group at the Oakland University. This collaborative effort will be enhanced by interactions with leading US and European research groups, and with leading domestic industrial partners to achieve a breakthrough in the development of device technology for microwave nano-spintronics. Broader impacts: he proposed research program will impact society in multiple ways. The new types of microwave on-chip nano-scale signal processing devices developed in this program will help maintain US leadership in microwave electronics. A number of undergraduate and graduate students will be exposed to the modern methods of nanoscience and nanotechnology, and will interact with the leading foreign and domestic research groups, as well as with our industrial partners. The proposed program will prepare valuable specialists for the US electronics and magnetic recording industries that are currently undergoing a rapid transition from the micro- to the nano-scale, and will enhance the US research infrastructure. A special mentoring program for post-doctoral researchers, educating them on writing research proposals and organizing collaborative research, will prepare our postdocs for the future independent scientific careers. The outreach activities (lectures and demonstrations on nanoscience and nanotechnology tailored for K-12 teachers and students) will contribute to the development of skilled workforce and scientifically informed public. The proposed program will also create a strong impact on education as a result of incorporating theoretical and experimental methods of nanotechnology into the graduate and undergraduate university curricula by the program participants.