Zeitschrift für Physik B Condensed Matter

, Volume 38, Issue 1, pp 77–81 | Cite as

Enhanced superconductivity in zirconium after H(D) implantation

  • B. Stritzker
  • J. D. Meyer


Zirconium foils (superconducting transition atT c =0.7 K) were implanted at liquid helium temperatures with hydrogen, deuterium and helium. In all cases a remarkable increase ofT c was observed. Implantation of the inert He atoms leads only to the introduction of lattice defects, which is known to increaseT c of Zr. However, the implanted H and D atoms exert an additional influence on the superconducting behavior based on a change of the electronic properties and an increase of the electron-phonon coupling. Introduction of lattice defects seems to account for theT c increase to 1.49 K after He implantation, whereasT c is even more enhanced by implantation of the hydrogen isotopes. The maximum values forT c are 3.14 K for H and 4.65 K for D implantation. The concentration necessary to produce a saturation inT c for both isotopes is H(D)/Zr≈0.13. The remarkably highT c for the heavier isotope corresponds to an extreme inverse isotope effect. A smaller inverse isotope effect was found earlier in the Pd −H(D) system, where it could be explained by anharmonic effects.


Hydrogen Neural Network Zirconium Helium Deuterium 
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Copyright information

© Springer-Verlag 1980

Authors and Affiliations

  • B. Stritzker
    • 1
  • J. D. Meyer
    • 1
  1. 1.Institut für FestkörperforschungKernforschungsanlage JülichJülich 1W. Germany

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