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.***

新墨西哥州立大学的这项教师早期职业发展（职业）项目将集中在强烈相关的电子系统上，这些系统表现出磁性时刻的非共线安排。 非电线级别可以通过足够高的压力或高磁场的应用来扰动，在这种情况下，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，Zeeman和晶体场项而引起的贡献。 对强相关的电子系统中的磁性有更好的理解将提供有关磁矩之间相互作用的复杂层次结构，标准模型的有效性限制以及远距离磁性的前提的必不可少的信息。 该项目将在洛斯阿拉莫斯国家实验室使用中子散射和高磁场用户设施，并且将在多种型样品环境条件下进行大部分研究（低温，高压，高磁场， ）在世界其他地方无法实现。 研究生将获得磁性领域的深入专业知识，他们将获得最先进的中子散射和高磁场技术的技能，这些技术目前对前沿研究非常需要。 此外，该项目促进了在新墨西哥州南部和德克萨斯州的主要西班牙裔社区中的强大材料科学计划（具有许多有益的职业机会的快速发展领域）的努力。%%磁性材料对许多技术非常重要申请。新磁性设备的开发和设计需要详细了解正在研究的材料的磁性特性。具有强烈相互作用的电子的材料具有多种引人入胜的特性，其中许多特性尚未完全理解。在这些所谓的强相关的电子系统中，各种相互作用会导致磁矩以不寻常的非共线方式排列。新墨西哥州立大学的这项教师早期职业发展（职业）项目（职业）项目将重点介绍这种非连续性磁铁在世界纪录的外部条件（高压和高磁场）上的特性。预计结果将提供必不可少的输入，以建模强相关的电子系统中的磁性。研究生将接受从事世界一流研究的培训，这将有助于准备下一代学术界，国家实验室和工业的领先科学家。此外，该项目促进了在新墨西哥州南部和德克萨斯州的西班牙裔社区中，努力为强大的材料科学计划（一个具有许多有益的职业机会的快速发展的领域）。***