Oxygen-17 Nuclear Magnetic Resonance of Oxide Superconductors

他们提出了一个全面的研究氧-17核磁共振光谱行为的一系列氧化物超导体在其正常状态，在许多情况下，超导状态。更新的系统自然会包括在内，因为它们可用，以及一系列模型钙钛矿和铜氧化物。他们将获得这些体系的骑士位移、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，以促进光谱分配。他们将研究氧交换动力学；序贯氧化对核磁共振/超导行为的影响；“冻结”状态的话题；熔体纹理生长和去除“薄弱环节”。

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".