Oxygen-17 Nuclear Magnetic Resonance of Oxide Superconductors

氧化物超导体的氧17核磁共振

• 批准号: 8814789
• 负责人: Eric Oldfield
• 金额: $ 29万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-03-01 至 1992-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8814789&HistoricalAwards=false
• 关键词: Oxygen; 17; Nuclear; Magnetic; Resonance

They propose a comprehensive study of the oxygen-17 nuclear magnetic resonance spectroscopic behavior of a range of oxide superconductors in their normal, and in many cases, superconducting, state. Newer systems will naturally be included, as they become available, as will a series of model perovskites and copper oxides. They will obtain knight shift, linewidth, and spin-lattice (Korringa and Arrhenius) relaxation time (T1) behavior of each of these systems, and relate there to structure, and to the experimental Tc temperatures observed. Where appropriate, oriented samples will be used, to facilitate spectral assignments. They will investgigate the kinetics of oxygen exchange; the effects of sequential oxygenation on NMR/superconducting behavior; the topic of "frozen" states; melt textured growth and the removal of "weak links".

他们建议对一系列氧化物超导体在正常状态下的氧-17核磁共振光谱行为进行全面研究，在许多情况下，超导态也是如此。更新的系统自然会被包括在内，因为它们是可用的，一系列模型钙钛矿和铜氧化物也将包括在内。他们将获得每个系统的骑士移动、线宽和自旋晶格(Korringa和Arrhenius)弛豫时间(T1)行为，并将其与结构和观察到的实验TC温度联系起来。在适当的情况下，将使用定向样品，以便于指定光谱。他们将研究氧交换的动力学；顺序氧合对核磁共振/超导行为的影响；“冻结”状态的主题；熔融织构生长和“薄弱环节”的去除。