Effect of sulfur surface structure on nucleation of oxide seed layers on textured metals for coated conductor applications

摘要

We present a study of the {100}<100> biaxially textured Ni (001) surface and oxide seed layer nucleation by in situ reflection high-energy electron diffraction and Auger electron spectroscopy. Our observations revealed the existence of a c(2×2) superstructure on the textured Ni surface due to segregation of sulfur contained in the bulk metal. The sulfur superstructure promotes the epitaxial (002) nucleation of seed layers such as Y{sub}2O{sub}3-stabilized ZrO{sub}2 (YSZ) and CeO{sub}2 on the metal and optimizes the biaxial texture necessary for high J{sub}c superconductors on RABiTS.