Journal of Low Temperature Physics

, Volume 7, Issue 3–4, pp 291–307 | Cite as

Superconductivity in the TiO and NbO systems

  • J. K. Hulm
  • C. K. Jones
  • R. A. Hein
  • J. W. Gibson


This paper presents electrical resistivity and superconductivity studies for the B1 (NaCl) structure oxides of titanium, vanadium, and niobium. In samples of nominal composition TiO x , VO x , and NbO x ,x was varied from 0.8 to 1.2. It was found that all three of these oxides exhibit room-temperature electrical resistivities characteristic of metallic behavior. With decreasing temperature, the resistivity drops steeply in the case of NbO x , but remains steady or rises somewhat in the case of TiO x and VO x , depending on the exact value ofx. It is suggested that in TiO x and VO x there is a large resistivity component due to scattering of carriers by disordered vacancies. Superconductivity was observed in NbO x (Tc=1.38 K,x=1.0) and TiO x (Tc=1.0 K,x=1.07). In the latter case the material showed a well-defined maximum ofTc as a function of composition, withTc<0.05 K forx<0.85 andx>1.20. Several VO x samples remained normal to 0.07 K.


Oxide Titanium Vanadium Niobium Electrical Resistivity 
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Copyright information

© Plenum Publishing Corporation 1972

Authors and Affiliations

  • J. K. Hulm
    • 1
  • C. K. Jones
    • 1
  • R. A. Hein
    • 2
  • J. W. Gibson
    • 2
  1. 1.Westinghouse Research LaboratoriesPittsburgh
  2. 2.Naval Research LaboratoryWashington, D.C.

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