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Test of Tc-Predictions Using the Rigid Band Model for Refractory Compounds

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Novel Superconductivity

Abstract

B1-compounds are particularly suitable to test Tc-predictions, as they form continuous solid solutions with intermediate properties reflecting the changing number of valence electrons (VE). Thin films of the Nb1-xMoxC, Nb1-xMoxC1-yNy and MoCxNy systems were prepared by sputtering. There are serious discrepancies between theory and the experimental results. In particular, the predicted minimum at 10.45 VE was not observed. It was possible to prepare Nb0.3Mo0.7C with 9.7 VE stoichiometrically. Instead of the expected Tc of 17 K only 13 K was measured. In the NbCl-yNy, Ti1-xNbxN and Ti1-xNbxC1-yNy systems for around 9.7 VE a Tc of up to 17.3 K is observed in agreement with theory. However, where theoretically a narrow maximum is predicted, high Tc values are observed for a wide range of VE.

On leave of absence from the Physical Institute, Czechoslovak Academy of Sciences, Prague, CSSR

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Author information

Authors and Affiliations

  1. Institut für Nukleare Festkörperphysik, Kernforschungszentrum Karlsruhe, P.O.B. 3640, D-7500, Karlsruhe, Germany

    Ernst L. Haase & Jiri Ruzicka

Authors
  1. Ernst L. Haase
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  2. Jiri Ruzicka
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Editor information

Editors and Affiliations

  1. Naval Research Laboratory, Washington, D.C., USA

    Stuart A. Wolf

  2. Lawrence Berkeley Laboratory, University of California, Berkeley, Berkeley, California, USA

    Vladimir Z. Kresin

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© 1987 Plenum Press, New York

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Haase, E.L., Ruzicka, J. (1987). Test of Tc-Predictions Using the Rigid Band Model for Refractory Compounds. In: Wolf, S.A., Kresin, V.Z. (eds) Novel Superconductivity. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-1937-5_5

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  • DOI: https://doi.org/10.1007/978-1-4613-1937-5_5

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4612-9076-6

  • Online ISBN: 978-1-4613-1937-5

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