NIRT-Spin Distributions and Dynamics in Magnetic Nanostructured Materials

磁性纳米结构材料中的 NIRT-自旋分布和动力学

• 批准号: 0404252
• 负责人: James Erskine
• 金额: $ 140万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-15 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0404252&HistoricalAwards=false
• 关键词: NIRT; Spin; Distributions; Dynamics; Magnetic

This proposal was received in response to Nanoscale Science and Engineering initiative NSF-03-043, category NIRT. The effort involves a team of materials scientists with complementary expertise in magnetic thin film growth, nanostructure fabrication, mesoscopic physics and magnetic materials. The scientific objective of the research program is to advance the fundamental understanding of spin distributions and spin dynamics, including damping, in nanostructured magnetic materials on picosecond time scales. The development of high-performance ultrahigh-frequency magnetic materials will require new tools for probing and accurately modeling spin distributions on a nanometer spatial scale and spin dynamics on a sub-picosecond time scale. The current research combines technique development (spin-polarized electron scanning tunneling microscopy and femtosecond laser-based spin-dynamics), and novel materials synthesis (self-assembly and template growth) with multi-scale multi-phenomena theory and modeling. Integrated with this are outreach (NSF/UT Austin Research Experience for Undergraduates program) and educational components (new courses in nanotechnology and mesoscopic physics) that will provide new materials and trained personnel required for continued technological advances in magnetic materials.This proposal was received in response to Nanoscale Science and Engineering initiative NSF-03-043 category NIRT. The team consists of materials scientists with complementary expertise in magnetic thin film growth, nanostructure fabrication, theoretical materials physics, and magnetic materials characterization to address new scientific and technological issues that arise in submicrometer scale magnetic structures. The objective is to advance fundamental understanding of relationships between materials properties and magnetic response in microfabricated magnetic materials. Scientific and technological relationships between dimensionality, shape, and structure of nanoparticles and their magnetic properties will be investigated. The effort combines technique development (new high-speed high-spatial resolution probes of magnetic response) with new methods of producing sub-micron magnetic structures (atomic self-assembly), and powerful numerical/theoretical methods for simulating and understanding magnetic response. The research may lead to new magnetic materials with applications using currently unused high-frequency bands in radar, telecommunications, radio astronomy, spectroscopy and imaging. The research is integrated with educational and outreach activities including new graduate level courses covering magnetic nanostructures and technology and undergraduate research experience activities. The program is designed to attract and train the next generation of scientists and engineers required for continued scientific and technological advances in the application of magnetic materials.

该提案是响应纳米科学与工程倡议NSF-03-043，类别NIRT而收到的。这项工作涉及一个材料科学家团队，他们在磁性薄膜生长、纳米结构制造、介观物理和磁性材料方面具有互补的专业知识。该研究计划的科学目标是推进对皮秒时间尺度上纳米结构磁性材料中自旋分布和自旋动力学（包括阻尼）的基本理解。高性能超高频磁性材料的发展将需要新的工具来探测和精确建模纳米空间尺度上的自旋分布和亚皮秒时间尺度上的自旋动力学。目前的研究结合了技术开发（自旋极化电子扫描隧道显微镜和飞秒激光为基础的自旋动力学），和新材料的合成（自组装和模板生长）与多尺度多现象的理论和建模。与此相结合的是外展（NSF/UT奥斯汀研究经验的本科生计划）和教育组件（纳米技术和介观物理学的新课程），这将提供新的材料和训练有素的人员所需的持续技术进步的磁性materials.This建议是在响应纳米科学和工程倡议NSF-03-043类别NIRT收到。该团队由在磁性薄膜生长，纳米结构制造，理论材料物理和磁性材料表征方面具有互补专业知识的材料科学家组成，以解决亚微米尺度磁性结构中出现的新科学和技术问题。其目的是推进基本理解之间的关系的材料性能和磁响应的微制造磁性材料。将研究纳米粒子的尺寸、形状和结构与其磁性之间的科学和技术关系。这项工作将技术开发（新的高速高空间分辨率磁响应探针）与生产亚微米磁结构（原子自组装）的新方法以及用于模拟和理解磁响应的强大数值/理论方法相结合。这项研究可能会导致新的磁性材料的应用，使用目前未使用的高频波段在雷达，电信，射电天文学，光谱学和成像。该研究与教育和推广活动相结合，包括新的研究生课程，涵盖磁性纳米结构和技术以及本科生研究经验活动。该计划旨在吸引和培养下一代科学家和工程师，以继续推动磁性材料应用的科学和技术进步。