EAPSI: Probing Phase Transitions in Magnetic Materials

EAPSI：探测磁性材料中的相变

• 批准号: 1614332
• 负责人: Matthew Lawson
• 金额: $ 0.54万
• 依托单位: Lawson Matthew M
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-06-15 至 2017-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1614332&HistoricalAwards=false
• 关键词: EAPSI; Probing; Phase; Transitions; Magnetic

This project explores changes in the magnetic properties of materials that are important to our understanding of superconductors. Superconductors are materials that allow the flow of electricity without electrical resistance. These materials are widely used in MRI machines, MagLev trains, and scientific equipment. A better understanding will lead to cheaper and more practical equipment, as well as new technologies. Working in the lab of the expert sample grower Professor Kazuyoshi Yoshimura in Kyoto will enable rapid sample production and study.This project proposes to use nuclear magnetic resonance (NMR) techniques to study spin fluctuations in CsCo2Se2, a material with a two dimensional electronic structure, near an antiferromagnetic phase transition. This will be done by measuring the spin lattice relaxation rate (T1-1 ) as a function of temperature. This measurement will be repeated at each nuclear site in the crystal. This award under the East Asia and Pacific Summer Institutes program supports summer research by a U.S. graduate student and is jointly funded by NSF and the Japan Society for the Promotion of Science.

这个项目探讨了材料的磁性变化，这对我们理解超导体很重要。超导体是允许电流流动而没有电阻的材料。这些材料广泛用于MRI机器，MagLev火车和科学设备。更好的理解将导致更便宜和更实用的设备以及新技术。在京都的样品培养专家吉村和义教授的实验室工作，可以快速地进行样品的制作和研究。本项目提出利用核磁共振（NMR）技术研究具有二维电子结构的CsCo 2 Se 2在反铁磁相变附近的自旋涨落。这将通过测量作为温度的函数的自旋晶格弛豫速率（T1-1）来完成。这种测量将在晶体中的每个核位置重复。东亚和太平洋夏季研究所计划下的这个奖项支持美国研究生的夏季研究，由NSF和日本科学促进会共同资助。