ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract For technetium-carbon, molybdenum-carbon, and vanadium-carbon thin-film layer structures an oscillatory dependence of the superconducting transition temperature on carbon layer thickness is found. The oscillations take place for thin metal layers (d〈300 Å) and for very small thicknesses of the nonmetal film (d C〈30 Å). In addition to the oscillations ofT c , oscillations of the normal-state electrical resistance remaining up to room temperature are found in the layered samples. A correlation is observed between critical temperature and resistance changes: Maxima in the curveT c (d C) correspond to minima in ρ(d C). The amplitude of the critical temperature oscillations is 10–15% of theT c value and depends on the metal layer thickness, increasing with decreasingd approximately as 1/d. Also found in the thin-film layer structures are oscillations of the critical magnetic fieldsH c⊥ andH c⊥ correlating withT c oscillations. A mutual influence of nonmetal layers located on opposite sides of the metal film was observed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00658955
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