Development of a Variable Temperature, High Frequencey NMR System for Materials Research

开发用于材料研究的变温高频 NMR 系统

• 批准号: 9704225
• 负责人: Mark Meisel
• 金额: --
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-07-01 至 2000-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9704225&HistoricalAwards=false
• 关键词: Development; Variable; Temperature; Frequencey; NMR

9704225 Meisel This award provides support to develop a new variable temperature, high-frequency Nuclear Magnetic Resonance (NMR) instrument that will be housed in the new physics building that is being constructed on the Gainesville campus at the University of Florida. The device will have the capability of providing a wide range of magnetic field (up to 8.5 T with 10-6 homogeneity) in a 50 mm clear bore at room temperature. A broadband high frequency (5 to 350 MHz) spectrometer will be an integral part of the instrument. A variety of probes will be developed to allow NMR to span temperatures from 25 mK to 400 K. %%% This new instrument will serve as a tool to probe the microscopic electromagnetic interactions that are fundamental to our understanding of new low dimensional magnets (e.g. Haldane gap and spin-ladder materials) and novel magnetic systems (e.g. Kondo insulators and magnetic/nonmagnetic multilayers). In particular, the data provided by this instrument may not be obtainable by any other known experimental probe. In addition, when new extremes of magnetic field, temperature, and pressure seem to be natural extensions of the research, the experiments may be continued at the National High Magnetic Field Laboratory (NHMFL). The system (especially the spectrometer) is being designed in a manner which will make it compatible with the instrumentation used at the NHMFL at higher frequencies and magnetic fields. An important component of the proposed program is the education and training of postdoctoral fellows, graduate students, and undergraduate students. Members of the researcher team are trained in a variety of modern cross-disciplinary fields, including (but not limited to) cryogenics, electronics, ultra-high vacuum technology, NMR, macroscopic and microscopic surface science techniques, and new chemical synthesis protocols. When the junior researchers leave the group, they are prepared to tackle the heretofore unknown technic al and scientific questions of the future. ***

9704225 Meisel 该奖项支持开发一种新型变温高频核磁共振 (NMR) 仪器，该仪器将安装在佛罗里达大学盖恩斯维尔校区正在建造的新物理大楼内。 该设备能够在室温下在 50 毫米的通孔中提供宽范围的磁场（高达 8.5 T，均匀性为 10-6）。 宽带高频（5 至 350 MHz）光谱仪将是该仪器的一个组成部分。 将开发各种探针，使 NMR 能够跨越 25 mK 至 400 K 的温度。%%% 这种新仪器将作为探测微观电磁相互作用的工具，这对于我们理解新型低维磁体（例如磁体）至关重要。霍尔丹间隙和自旋梯材料）和新颖的磁性系统（例如近藤绝缘体和磁性/非磁性多层）。 特别是，该仪器提供的数据可能无法通过任何其他已知的实验探针获得。 此外，当新的极端磁场、温度和压力似乎是研究的自然延伸时，实验可能会在国家强磁场实验室（NHMFL）继续进行。 该系统（尤其是光谱仪）的设计方式将使其与 NHMFL 在更高频率和磁场下使用的仪器兼容。 该计划的一个重要组成部分是博士后、研究生和本科生的教育和培训。 研究团队成员接受过各种现代跨学科领域的培训，包括（但不限于）低温学、电子学、超高真空技术、核磁共振、宏观和微观表面科学技术以及新的化学合成方案。 当初级研究人员离开团队时，他们准备解决未来未知的技术和科学问题。 ***