Nb-Ti Composite Wires with Artificial Ferromagnetic Pins

  • L. D. Cooley
  • P. D. Jablonski
  • R. W. Heussner
  • D. C. Larbalestier
Part of the Advances in Cryogenic Engineering Materials book series (ACRE, volume 42)

Abstract

Flux-pinning data for Nb47Ti/Fe and Nb55Ti/Ni composites indicate that ferro-magnets pin by a barrier mechanism similar to the mechanism studied by Clem for superconductor/insulator multilayers. However, in contrast to Clem’s model, the optimum pin separation should be rather large, because at smaller pin separations the condition |ψ|2 = 0 at the superconductor/ferromagnet interface leads to a reduction of T c and H c2 . Nonetheless, we find no indication in the experimental data that pin separations much smaller than the predicted optimum value adversely affect J c, T c, or H c2.

Keywords

Critical Current Density Superconducting Order Parameter Scanning Electron Microscopy Data Filament Diameter Transport Critical Current Density 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • L. D. Cooley
    • 1
  • P. D. Jablonski
    • 2
  • R. W. Heussner
    • 3
  • D. C. Larbalestier
    • 4
  1. 1.Electromagnetic Technology DivisionNISTBoulderUSA
  2. 2.Teledyne Wah ChangAlbanyUSA
  3. 3.Applied Superconductivity CenterUniversity of Wisconsin-MadisonMadisonUSA
  4. 4.Depts. of Physics and Materials ScienceUniversity of Wisconsin-MadisonMadisonUSA

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