Weak Links, Grain Boundaries and Surfaces of High-Temperature Superconductors

这项研究的重点是一个最关键和最困难的 高温超导体领域的问题;作用 晶界作为体中的电流限制结构， 薄膜材料 这项研究将提供详细的研究 薄弱环节，晶界结构和成分，以及 作为高温超导体的表面性质。 的 薄弱环节的调查集中在单晶界， 多晶块状材料，并将采用薄样品 其临界电流可以局部探测， 晶界的结构和组成。 使用同步加速器的补充表面表征工作 辐射技术也将得到应用。 本研究是 可能具有重大战略意义， 使散装高密度聚乙烯商业应用成为可能的技术 高温超导材料。

This research focuses on one of the most critical and difficult issues in the field of high temperature superconductors; the role of grain boundaries as current limiting structures in bulk and thin film materials. This research will provide a detailed study of weak links, grain boundary structure and composition as well as surface properties of high temperature superconductors. The weak link investigations focus on single grain boundaries in polycrystalline bulk materials, and will employ thinned samples for which the critical current can be probed locally and the grain boundaries to their structure and composition. Complementary surface characterization work using synchrotron radiation techniques will also be carried out. This research is potentially of great strategic importance and could provide enabling technology for commercial applications of bulk high temperature superconducting materials.