Marks L D, Li D J, Shibahara H, Zhang J P
Materials Research Center, Northwestern University, Evanston, Illinois 60208.
J Electron Microsc Tech. 1988 Mar;8(3):297-306. doi: 10.1002/jemt.1060080308.
We review recent results obtained at Northwestern using high-resolution electron microscopy to study high-temperature superconductors. While in general these materials form large, very perfect single crystal grains which display very few imperfections, there is also evidence of slip defects, amorphous regions, and order-disorder transformations. We also report that the gadolinium-based superconductors and in one case yttrium-based superconductors show evidence for some copper solid solubility in the form of copper-rich planar defects. The structure of a metastable trigonal polytype is also reported, as are the effects of electron beam and water vapor damage to the materials.
我们回顾了西北大学利用高分辨率电子显微镜研究高温超导体所取得的最新成果。一般来说，这些材料会形成大的、非常完美的单晶颗粒，几乎没有缺陷，但也有滑移缺陷、非晶区域和有序-无序转变的证据。我们还报告说，钆基超导体以及在一个案例中的钇基超导体显示出以富铜平面缺陷形式存在的一些铜固溶体的证据。还报道了一种亚稳三方多型体的结构，以及电子束和水蒸气对材料的损伤效应。
