Reflection high-energy electron diffraction studies of epitaxial oxide seed-layer growth on rolling-assisted biaxially textured substrate Ni(001): The role of surface structure and chemistry

Cantoni, C.; Christen, D. K.; Feenstra, R.; Goyal, A.; Ownby, G. W.; Zehner, D. M.; Norton, D. P.
November 2001
Applied Physics Letters;11/5/2001, Vol. 79 Issue 19, p3077
Academic Journal
We present a study of the {100}<100> biaxially textured Ni(001) surface and seed-layer growth using in situ reflection high-energy electron diffraction and Auger electron spectroscopy. Our observations are consistent with formation of a c(2×2) two-dimensional superstructure due to the surface segregation of sulfur contained in the metal. We show that this superstructure can have a dramatic effect on the heteroepitaxial growth of oxide seed layers. In particular, the surface superstructure promotes the (200) epitaxial oxide growth of Y[sub 2]O[sub 3]-stabilized ZrO[sub 2], which is necessary for the development of high-J[sub c] superconducting films for coated conductors. © 2001 American Institute of Physics.


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