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Published July 1970 | public
Journal Article Open

Electrical Properties and Superconductivity of Rhenium and Molybdenum Films


Electrical and superconducting properties of rhenium and molybdenum films prepared by electron beam evaporation have been measured as a function of substrate temperature, film thickness, and substrate material. The films were prepared at residual pressures of 5×10^–8 Torr. In addition, films of each material were prepared by reactive deposition at nitrogen pressures in the 10^–5 Torr range. Rhenium films prepared at low residual pressures exhibited superconductivity with onset temperatures from 2.5–4.9 K depending on thickness and substrate temperature. However, rhenium films prepared by reactive deposition in nitrogen had onset temperatures from 4.6–5.5 K. Transition temperatures from 3.3–3.8 K were observed in molybdenum films at thicknesses greater than 6000 Å when deposited at substrate temperatures of 600 °C. Crystal structure and preferred orientation were determined by x-ray diffraction methods.

Additional Information

© 1970 American Vacuum Society. (Received 12 December 1969) The generous help of J. McCamont during the course of this work is gratefully acknowledged.


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