CAREER: Effects of Pressure and Magnetic Field in Strongly-Correlated-Electron Systems with Non-Collinear Magnetism

职业：具有非共线磁力的强相关电子系统中压力和磁场的影响

• 批准号: 0094241
• 负责人: Heinrich Nakotte
• 金额: $ 45万
• 依托单位: New Mexico State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-01-15 至 2006-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0094241&HistoricalAwards=false
• 关键词: CAREER; Effects; Pressure; Magnetic; Field

This Faculty Early Career Development (CAREER) project at New Mexico State University will focus on strongly-correlated-electron systems that exhibit non-collinear arrangements of the magnetic moments. Non-collinear order can be perturbed by the application of sufficiently high pressures or high magnetic fields, where different dependencies would allow separating direct and indirect exchange interactions as well as contributions due to coherence, Zeeman and crystal-field terms. A better understanding of the magnetism in strongly-correlated-electron systems will provide indispensable information on the complicated hierarchy of interactions between magnetic moments, the limits of validity of standard models, and the pre-conditions for long-range magnetic order. The project will use the neutron-scattering and high-magnetic-field user facilities at Los Alamos National Laboratory, and a substantial portion of the studies will be performed under multi-extreme sample-environment conditions (low temperatures, high pressures, high magnetic fields) that cannot be achieved elsewhere in the world. Graduate students will gain in-depth expertise in the field of magnetism and they will acquire skills in cutting-edge neutron-scattering and high-magnetic-field techniques, which are currently in great demand for forefront research. In addition, this project fosters efforts toward a strong Materials Science Program (a fast-growing field with many rewarding career opportunities) in the predominantly Hispanic communities in Southern New Mexico and Western Texas.%%%Magnetic materials are of extraordinary importance for many technological applications. The development and design of new magnetic devices requires a detailed understanding of the magnetic properties of the material under investigation. Materials with strongly interacting electrons exhibit a variety of fascinating properties, many of which are not completely understood. In these so-called strongly-correlated-electron systems, various interactions can cause the magnetic moments to arrange in an unusual non-collinear fashion. This Faculty Early Career Development (CAREER) project at New Mexico State University will focus on the properties of such non-collinear magnets at world-record external conditions (high pressures and high magnetic fields). The results are expected to provide indispensable input for modeling the magnetism in strongly-correlated-electron systems. Graduate students will be trained in performing world-class research, and this will help to prepare the next generation of leading scientists in Academia, National Laboratories and Industry. In addition, this project fosters efforts toward a strong Materials Science Program (a fast-growing field with many rewarding career opportunities) in the predominantly Hispanic communities in Southern New Mexico and Western Texas.***

新墨西哥州州立大学的这个教师早期职业发展（CAREER）项目将专注于表现出磁矩非共线排列的强相关电子系统。 非共线的顺序可以通过施加足够高的压力或高磁场来扰动，其中不同的依赖性将允许分离直接和间接的交换相互作用以及由于相干性、塞曼和晶体场项的贡献。 更好地理解强关联电子系统中的磁性，将为磁矩之间相互作用的复杂层次、标准模型的有效性极限以及长程磁序的先决条件提供不可或缺的信息。 该项目将使用洛斯阿拉莫斯国家实验室的中子散射和高磁场用户设施，相当一部分研究将在世界其他地方无法实现的多种极端样品环境条件（低温、高压、高磁场）下进行。 研究生将获得深入的专业知识，在磁性领域，他们将获得尖端的中子散射和高磁场技术，这是目前在前沿研究的巨大需求的技能。 此外，该项目还促进了在新墨西哥州南部和德克萨斯州西部以西班牙裔为主的社区建立强大的材料科学计划（一个快速发展的领域，有许多有益的职业机会）。磁性材料对于许多技术应用具有特别重要的意义。新磁器件的开发和设计需要详细了解所研究材料的磁特性。具有强相互作用电子的材料表现出各种迷人的特性，其中许多尚未完全理解。在这些所谓的强关联电子系统中，各种相互作用可以导致磁矩以不寻常的非共线方式排列。新墨西哥州州立大学的这个教师早期职业发展（CAREER）项目将专注于这种非共线磁体在世界纪录的外部条件（高压和高磁场）下的性能。研究结果将为强关联电子系统的磁性建模提供必要的参考。研究生将接受世界级研究的培训，这将有助于为学术界，国家实验室和工业界的下一代领先科学家做好准备。此外，该项目促进了在新墨西哥州南部和德克萨斯州西部的主要西班牙裔社区的强大材料科学计划（一个快速增长的领域，有许多有益的职业机会）的努力。