Journal of Low Temperature Physics

, Volume 56, Issue 3–4, pp 379–381 | Cite as

Some observations on heavy fermion superconductivity in UBe13

  • G. R. Stewart
  • A. L. Giorgi
Article

Abstract

Recently it has been discovered that very slight substitution of Cu for Be in UBe13 depresses superconductivity below 0.050 K. We have measured the low-temperature specific heat of UBe12.94 Cu0.06(Tc<0.050 K) and found that the heavy fermion, condensed phase present in UBe13 appearsunaltered in the copper-substituted material. Therefore, the presence of high-mass electrons is not directly correlated with superconductivity in UBe13.

Keywords

Magnetic Material Condensed Phase Heavy Fermion Heavy Fermion Superconductivity Slight Substitution 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    F. Steglich, J. Aarts, C. D. Bredl, W. Lieke, D. Meschede, W. Franz, and H. Schäfer,Phys. Rev. Lett. 43, 1892 (1979).Google Scholar
  2. 2.
    H. R. Ott, H. Rudigier, Z. Fisk, and J. L. Smith,Phys. Rev. Lett. 50, 1595 (1983).Google Scholar
  3. 3.
    F. Steglich, J. Aarts, C. D. Bredl, G. Cordier, F. R. de Boer, W. Lieke, and U. Rauchschwalbe inSuperconductivity in d- and f-Band Metals, W. Buckel and W. Weber, eds. (Kernforschungszentrum Karlsruhe, 1982), p. 145.Google Scholar
  4. 4.
    G. R. Stewart, Z. Fisk, and J. O. Willis,Phys. Rev. B 28, 172 (1983).Google Scholar
  5. 5.
    J. L. Smith, Z. Fisk, J. O. Willis, B. Batlogg, and H. R. Ott, paper presented at conference on Magnetism and Magnetic Materials, Pittsburgh, 8–11 November 1983, and to appear inJ. Appl. Phys. Google Scholar
  6. 6.
    A. L. Giorgi, Z. Fisk, J. O. Willis, G. R. Stewart, and J. L. Smith, to be published.Google Scholar
  7. 7.
    G. R. Stewart, Z. Fisk, J. L. Smith, H. R. Ott, and F. M. Mueller, unpublished.Google Scholar
  8. 8.
    K. Andres, J. E. Graebner, and H. R. Ott,Phys. Rev. Lett. 35, 1779 (1975).Google Scholar

Copyright information

© Plenum Publishing Corporation 1984

Authors and Affiliations

  • G. R. Stewart
    • 1
  • A. L. Giorgi
    • 1
  1. 1.Los Alamos National LaboratoryLos Alamos

Personalised recommendations