Structure Dependent Properties of Thin Film Superconductors.
CITY UNIV OF NEW YORK RESEARCH FOUNDATION
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The surface properties of superconductors have been studied using low energy electron diffraction and Auger spectroscopy. Thin films of superconducting compounds have been produced by evaporating thin layers of aluminum and tin onto niobium and then annealing at a suitable temperature. The resulting films have a transition temperature approaching that of the bulk compounds. The interaction between niobium and nitrogen has been investigated, and the sticking coefficients measured. N forms an order 5x5 structure. The production of thin skins of a superconducting compound on a substrate of one of the components has been shown to be a viable technique and could have many useful applications. The conditions for growth of the skin are critical and not all compounds could be so formed. Author
- Solid State Physics