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.

该建议是为了回应纳米级科学和工程计划NSF-03-043，类别NIRT。这项工作涉及一组材料科学家团队在磁性薄膜生长，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。研究计划的科学目标是在皮秒时间量表上纳米结构材料中对自旋分布和旋转动态（包括阻尼）的基本了解。高性能超高频率磁性材料的开发将需要新的工具来探测并在纳米空间尺度上准确对旋转分布进行建模，并在次秒时尺度上进行自旋动力学。当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基于飞秒激光的自旋动力学），以及新型的材料合成（自组装和模板生长）以及多规模的多层型理论和建模。 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.该团队由材料科学家组成，具有磁性薄膜生长，纳米结构制造，理论材料物理学以及磁性材料表征的互补专业知识，以解决亚微米尺度磁性结构中出现的新科学和技术问题。目的是提高对材料特性与微生物磁性材料中磁反应之间关系的基本理解。将研究纳米颗粒及其磁性特性之间的科学和技术关系。这项工作结合了技术的开发（新的高速高空间分辨率探针）与产生亚微米磁性结构（原子自组装）的新方法，以及模拟和理解磁反应的强大数值/理论方法。这项研究可能会通过使用当前未使用的高频带中的应用，电信，射电天文学，光谱和成像来实现新的磁性材料。这项研究与教育和外展活动融合在一起，包括涵盖磁性纳米结构和技术以及本科研究经验活动的新研究生水平课程。该计划旨在吸引和培训下一代科学家和工程师在应用磁性材料时持续的科学和技术进步所需的。