Metal-oxide interfaces in 2 ND generation HTS wires: Mechanism of epitaxial growth of oxide films mediated by a sulfur superstructure

C. Cantoni, D. K. Christen, A. Goyal, L. Heatherly, F. A. List, E. D. Specht, M. Varela, S. J. Pennycook

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Metal-oxide interfaces are of great interest in a variety of applications including gate oxide layers in the semiconductor industry and high-temperature superconductor-based coated conductors in the field of high power electrical applications. For the latter application highly oriented oxide buffer layers compatible with HTS materials have to be deposited on a flexible metal tape. The maximum superconducting current that a RABiTS tape can carry is strongly dependent on the degree of epitaxy of the buffer layers, and the structural and chemical stability of the metal/oxide interface. The epitaxial growth of the first buffer layer on the metal is a sensitive step that requires the pre-formation of a c (2×2) superstructure on the metal surface, which is provided by segregation or adsorption of sulfur. We will present the details of formation of the S superstructure on Ni and Pd metal surfaces and its influence on the nucleation of entire classes of oxide films.

Original languageEnglish
Title of host publicationInterfaces in Electronic Materials - Proceedings of the International Symposium
Pages53-64
Number of pages12
StatePublished - 2006
Event204th Electrochemical Society Fall Meeting - Orlando, FL, United States
Duration: Oct 12 2003Oct 16 2003

Publication series

NameProceedings - Electrochemical Society
VolumePV 2003-31

Conference

Conference204th Electrochemical Society Fall Meeting
Country/TerritoryUnited States
CityOrlando, FL
Period10/12/0310/16/03

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