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Journal of Low Temperature Physics

, Volume 5, Issue 5, pp 519–536 | Cite as

Superconducting beryllium films

  • Rolfe E. GloverIII
  • Stefan Moser
  • Friedhold Baumann
Article

Abstract

Resistance-vs.-temperature measurements were made on a series of beryllium films condensed on liquid-helium cooled surfaces. Two vapor sources designed to reduce contamination were used and films were prepared on both crystalline quartz and glass substrates. The samples were superconducting with a transition temperature ofT c =9.6±0.1 K as indicated by a sharp falloff of resistance on cooling. This qualitatively confirms earlier reports of the superconductivity of quenched beryllium films. The transition curves were, however, appreciably sharper and the transition temperature about a degree higher than previously reported. Good agreement found from sample to sample indicates that the residual impurity concentration was small enough to be unimportant and that the observed transition temperature is characteristic of pure beryllium. The phase of beryllium responsible for the highT c value disappeared on annealing in the range 40–60 K. No indication was found of a reportedT c ≈6-K phase. Beryllium films thicker than about 750 Å broke up during deposition, indicating the presence of large stresses.

Keywords

Quartz Transition Temperature Temperature Measurement Magnetic Material Glass Substrate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Publishing Corporation 1971

Authors and Affiliations

  • Rolfe E. GloverIII
    • 1
  • Stefan Moser
    • 2
  • Friedhold Baumann
    • 2
  1. 1.Department of Physics and AstronomyUniversity of MarylandCollege Park
  2. 2.Physikalisches InstitutUniversität Karlsruhe (T.H.)KarlsruheGermany

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