High-Frequency EPR Studies of Strong Spin-Orbit Effects in Molecular Magnetism

****技术摘要****合理设计具有特定应用特性的磁性分子的能力是分子磁学领域的关键目标。过去几年在这方面取得了显著的突破，这得益于对具有强自旋轨道各向异性的磁性离子组成的分子的研究，例如轨道简并过渡金属和镧系元素。为了从理论上理解这些高度各向异性的磁性材料，在非常高的场和频率下进行电子顺磁共振（EPR）研究是必不可少的。国家高磁场实验室（NHMFL）最近的仪器发展，跨越了前所未有的领域和频率范围，将为更多当前感兴趣的材料打开EPR技术的大门。所获得的信息将有助于提高对决定这些材料行为的重要静态和动态过程的理论理解。与化学家的紧密合作将提供一个关键的反馈回路，具有分子基磁性材料变革性进步的潜力。两名女研究生将参与研究。还将组织跨学科讲习班，为来自不同背景的大量年轻研究人员提供优秀的教育机会，并为NHMFL EPR计划内的知识转移提供管道。****非技术摘要****纳米级分子磁性材料的基础研究对信息处理技术的未来发展至关重要。在过去的几年里，这一领域取得了显著的进展，这得益于对分子磁体的研究，这些分子磁体是基于元素周期表中较重的元素，而不是那些传统上感兴趣的元素，如稀土元素。这些材料的不同寻常的特性使得它们在应用中具有吸引力，这就需要开发新的测量技术。该项目将利用美国国家高磁场实验室提供的独特的高磁场，以及最近开发的磁共振方法来解决这个问题，以期更好地了解产生技术上有用特性的物理过程。物理学家和化学家之间的紧密合作将提供一个关键的反馈回路，具有分子基磁性材料变革性进步的潜力。两名女学生将参与研究。还将组织跨学科讲习班，为来自不同背景的大量年轻研究人员提供优秀的教育机会。

****Technical Abstract****The ability to rationally design magnetic molecules with properties tailored for specific applications represents a key goal within the molecular magnetism community. The past few years have seen remarkable breakthroughs in this regard, aided by the study of molecules comprised of magnetic ions with strong spin-orbit anisotropy, e.g., orbitally degenerate transition metals and lanthanides. In order to develop a theoretical understanding of these highly anisotropic magnetic materials, electron paramagnetic resonance (EPR) studies performed at very high fields and frequencies are essential. Recent instrument developments at the National High Magnetic Field Laboratory (NHMFL), spanning unprecedented field and frequency ranges, will open up the EPR technique to many more materials of current interest. The information obtained will lead to improved theoretical understanding of the important static and dynamical processes that dictate the behavior of these materials. Strong collaboration with chemists will provide a crucial feedback loop, with the potential for transformative advances in molecule-based magnetic materials. Two female graduate students will participate in the research. Interdisciplinary workshops will also be organized, providing outstanding educational opportunities for a significant number of young researchers from diverse backgrounds, and a pipeline for knowledge transfer from within the NHMFL EPR program.****Non-Technical Abstract****Fundamental studies of nano-scale molecular magnetic materials are essential for future advances in information processing technologies. The past few years have seen remarkable advances in this field, aided by investigations of molecular magnets based on heavier elements found further down the periodic table than those that have traditionally been of interest, e.g., rare-earth elements. The unusual properties of these materials that make them attractive for applications necessitate the development of new measurement techniques. This project will bring to bear on this problem the uniquely high magnetic fields available at the US National High Magnetic Field Laboratory, together with recently developed magnetic resonance methodologies, with a view to obtaining improved understanding of the physical processes that give rise to technologically useful properties. Strong collaboration between physicists and chemists will provide a crucial feedback loop, with the potential for transformative advances in molecule-based magnetic materials. Two female students will participate in the research. Interdisciplinary workshops will also be organized, providing outstanding educational opportunities for a significant number of young researchers from diverse backgrounds.