Effects of Surface Superconductivity in Low-к Al-Ag Alloys

  • A. Nemoz
  • J. C. Solecki


The supersaturated solid solution of silver in aluminum decomposes during an isothermal aging according to the following sequence: Guinier-Preston zones → γ΄ precipitates → γ precipitate (≃ Ag2A1).1 The Guinier-Preston zones are spherical, silver-rich (≃ 60 at. %) clusters, coherent with the matrix and of the same crystallographic structure, distributed at random in a depleted matrix. During the preprecipitation stage (Guinier-Preston zones) zones are growing with a coarsening process and the residual resistivity measured at 4.2°K is decreasing. When the diameter is about 100 Ǻ the precipitation of γ΄ phase begins.


Magnetization Curve Supersaturated Solid Solution Residual Resistivity Isothermal Aging Meissner State 


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  1. 1.
    C.B. Walker and A. Guinier, Acta Met. 1, 588 (1953);CrossRefGoogle Scholar
  2. R.B. Nicholson and A. Kelly, Precipitation Hardening, in Progress in Material Sciences, Vol. 10, Ed. by Chalmers, p. 255.Google Scholar
  3. 2.
    J. Blanc, A. Nemoz, and J.C. Solecki, Proc. 12th Intern. Conf. Low Temp. Phys., 1970, Academic Press of Japan, Tokyo (1971).Google Scholar
  4. 3.
    R. Baur and V. Gerold, Acta Met. 10, 637 (1962).CrossRefGoogle Scholar
  5. 4.
    J. Blanc, J.C. Solecki, and A. Nemoz, Rev. Phys. Appl. 6, 551 (1971).CrossRefGoogle Scholar
  6. 5.
    J. Blanc, Thesis, Grenoble, 1972.Google Scholar
  7. 6.
    A. Nemoz, J.C. Solecki, J.P. Faure, and J.R.G. Keyston, Rev. Phys. Appl. 4, 42 (1969).CrossRefGoogle Scholar
  8. 7.
    D. Saint-James and P.G. De Gennes, Phys. Lett. 7, 306 (1964).ADSGoogle Scholar
  9. 8.
    H.J. Fink and L.J. Barnes, Phys. Rev. Lett. 15, 792 (1965);ADSCrossRefGoogle Scholar
  10. H.J. Fink and R.D. Kessinger, Phys. Rev. 140A, 1937 (1965).MathSciNetADSCrossRefGoogle Scholar
  11. 9.
    G. Deutscher, J. Phys. Chem. Solids 28, 741 (1967).ADSCrossRefGoogle Scholar
  12. 10.
    J.P. McEvoy, D.P. Jones, and J.G. Park, Solid State Commun. 5, 641 (1967).ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • A. Nemoz
    • 1
  • J. C. Solecki
    • 1
  1. 1.Centre de Recherches sur les Très Basses TempératuresCNRSGrenoble-CedexFrance

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