Dynamics in Patterned Magnetic Nanostructures: Spin-Wave Excitations and Propagation

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。图案化的磁性纳米结构表现出极大不同的性质相比，他们的散装同行，包括改变动态激发。该项目将探索磁性纳米结构中的磁化动力学，重点关注与磁涡旋和反涡旋动力学相关的现象，以及纳米图案磁性系统中自旋波的产生和传播。 这将包括研究由涡旋和反涡旋动态核心反转产生的自旋波爆发，以及磁性纳米线中的自旋波传播和过滤过程。结合实验和数值研究将被用来探索和理解这些过程。 除了基本的兴趣之外，磁性纳米结构在未来的信息存储应用、非易失性存储器和显示出对信息的能量有效处理的前景的自旋电子学应用中具有巨大的潜力。本科生和研究生的参与和培训将在这项研究中发挥至关重要的作用。学生将参与该计划的各个方面，包括新实验装置的建设。该项目还将涉及一个与教师和公众的纳米科学和纳米磁学资源的发展有关的推广组成部分。非技术AbstractThis奖是根据2009年美国复苏和再投资法案（公法111-5）资助的。将磁性材料的尺寸减小到亚微米或纳米尺寸会改变系统的能量学，并导致截然不同的磁性景观和动态激发，这对当前和未来的各种技术都很重要。随着制造和研究纳米级结构的实验能力不断提高，有大量的现象有待探索的数值模型预测。这个项目将探索磁性纳米结构的磁化动力学。特别是，该项目将研究与磁涡旋和反涡旋动力学相关的现象，以及纳米图案化磁系统中自旋波的产生和传播。 自旋波是在磁性材料的有序性中传播的扰动。该项目将结合数值和实验研究来探索和理解这些过程。 除了被根本利益，磁性纳米结构具有巨大的潜力，未来的信息存储应用，非易失性存储器？即时启动计算机，以及自旋电子学应用，即利用电子自旋而不仅仅是其电荷的设备，这为未来的信息能量高效处理带来了希望。本科生和研究生的参与和培训将在这项研究中发挥重要作用。学生将参与该计划的各个方面，包括新实验装置的建设。该项目还将包括一个与为教师和公众开发纳米科学和纳米磁性资源有关的外联部分。

Technical AbstractThis award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). Patterned magnetic nanostructures exhibit vastly different properties compared to their bulk counterparts, including altered dynamic excitations. This project will explore magnetization dynamics in magnetic nanostructures, focusing on phenomena associated with the dynamics of magnetic vortices and antivortices, as well as, the generation and propagation of spin waves in nanopatterned magnetic systems. This will include the study of the generation of spin-wave bursts by vortex and anti-vortex dynamic core reversal and spin-wave propagation and filtering processes in magnetic nanowires. Combined experimental and numerical investigations will be used to explore and understand these processes. In additional to being of fundamental interest, magnetic nanostructures hold great potential for future information storage applications, non-volatile memory, and for spintronics applications that show promise for energy-efficient processing of information. The involvement and training of students at the undergraduate and graduate levels will play a vital role in this research. Students will participate in all aspects of the program, including the construction of new experimental set-ups. The project will also involve an outreach component related to the development of nanoscience and nanomagnetism resources for teachers and the general public.Non-Technical AbstractThis award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). Reducing the size of a magnetic material down to sub-micrometer or nanometer dimensions changes the energetics of the system and leads to vastly different magnetic landscapes and dynamic excitations that are important for a wide range of present and future technologies. As experimental capabilities for fabricating and investigating structure on the nanoscale continue to improve, there is a wealth of phenomena predicted by numerical models waiting to be explored. This project will explore the magnetization dynamics of magnetic nanostructures. In particular, the project will examine phenomena associated with the dynamics of magnetic vortices and antivortices, as well as, the generation and propagation of spin waves in nanopatterned magnetic systems. Spin waves are propagating disturbances in the ordering of a magnetic material. The project will use combined numerical and experimental investigations to explore and understand these processes. In additional to being of fundamental interest, magnetic nanostructures hold great potential for future information storage applications, non-volatile memory for ?instant-on? computers, and for spintronics applications, that is, for devices that utilize the spin of the electron rather than just its charge, which hold promise for future energy-efficient processing of information. The involvement and training of students at the undergraduate and graduate levels will play a vital role in this research. Students will participate in all aspects of the program, including the construction of new experimental set-ups. The project will also involve an outreach component related to the development of nanoscience and nanomagnetism resources for teachers and the general public.