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YBaCuO-insulator-normal metal tunnel junctions

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7 Author(s)
Ghyselen, B. ; Thomson-CSD, Lab. Central de Recherches, Orsay, France ; Cabanel, R. ; Garry, G. ; Dubreuil, D.
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YBaCuO-insulator-normal metal tunnel junctions were fabricated and characterized. The thin insulating barrier was formed using a CHF/sub 3/ treatment in a reactive ion etching system. X-ray photoelectron spectroscopy (XPS) measurements and Auger depth profiling confirmed the formation of a fluorinated surface layer. First electrical results are similar to those generally obtained for natural barriers: no well-defined gap but small gaplike structures; existence of a conductance at zero bias; and an increasing conductance, often linear versus voltage, at high biases.<>

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Applied Superconductivity, IEEE Transactions on  (Volume:3 ,  Issue: 1 )