CLEAN GRAIN-BOUNDARIES AND WEAK LINKS IN HIGH-TC SUPERCONDUCTING YBA2CU3O7-X THIN-FILMS

被引：46
作者：
SHIN, DH
SILCOX, J
RUSSEK, SE
LATHROP, DK
MOECKLY, B
BUHRMAN, RA
机构：
来源：
APPLIED PHYSICS LETTERS | 1990年 / 57卷 / 05期
关键词：
D O I：
10.1063/1.104242
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
It is demonstrated that polycrystalline thin films of high Tc superconducting YBa2Cu3O7-x can be grown with clean grain boundaries, i.e., without a boundary layer of segregation or different phase. In clean stoichiometric samples, angular misorientations of grains may be the origin of weak link behavior. High-resolution scanning transmission electron microscope images of films grown on ZrO2 and MgO by reactive evaporation, reactive sputtering, and laser ablation show atomic lattice images of clean grain boundaries. X-ray microanalysis with a 10 Å spatial resolution also indicates no composition deviation at the grain boundaries. Grain sizes and epitaxial relations of samples prepared by different methods are characterized.
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页码：508 / 510
页数：3
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