High Field NbN Superconductor on Carbon Fibers

  • M. Dietrich
  • C.-H. Dustmann
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 30)

Abstract

Superconducting niobium nitride with a B1 structure is a good example of the powerfulness of using vapour deposition methods compared to conventional metallurgical processes. Since the discovery of Aschermann’, the superconducting transition temperature of NbN* remained fairly constant, whereas the critical magnetic field parameter, Bc2, for NbN ranged from 8 T for diffusion nitrided samples2 up to 50 T for physical vapour deposited (PVD) films3. This difference is the result of the ability to generate microstructures far removed from metallurgically processed materials. These microstructures have the desired side effect, that brittle compounds become more flexible. For a NbN film thickness of 7 μm, flexibility to a 5 mm bending radius without Tc degradation is reported4. Another recent result about strain effects on the critical current of NbN revealed no degradation to at least 0.7% strain5. It is well known that the simple B1 structure is insensitive to disorder and, therefore, superconductivity of NbN will not suffer much from neutron irradiation6.

Keywords

Quartz Epoxy Brittle Chlorine Pyrolysis 

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Copyright information

© Springer Science+Business Media New York 1984

Authors and Affiliations

  • M. Dietrich
    • 1
  • C.-H. Dustmann
    • 2
  1. 1.Kernforschungszentrum KarlsruheInstitut für Technische PhysikKarlsruheGermany
  2. 2.Brown, Boveri & Cie AGMannheimGermany

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