Journal of Superconductivity and Novel Magnetism

, Volume 28, Issue 2, pp 431–436 | Cite as

Superconducting Proximity Effect in Crystalline Co and Cu Nanowires

  • Maksym Kompaniiets
  • Oleksandr V. Dobrovolskiy
  • Cornelia Neetzel
  • Wolfgang Ensinger
  • Michael Huth
Original Paper

Abstract

Superconducting proximity effect is investigated by electrical resistance measurements in individual single-crystal Cu and polycrystalline Co nanowires in contact with a W-based floating inducer electrode (Tc = 5.2 K). Our analysis of the resistance drops shows that in both nanowires, (i)the superconducting proximity length ξ is of the order of 1 μm at 2.4 K and (ii) its temperature dependencies can be fitted well to an expression of the form \(\xi (T) \propto \sqrt {1/T}\) in a wide temperature range, in good agreement with the theoretical predictions for ξ(T) in the diffusive limit. For the Co nanowire, dependencies of the spin-triplet ξ upon current and magnetic field are also reported.

Keywords

Superconducting proximity effect Single nanowires Focused particle beams Nanopatterning Electrical resistance measurements 

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Maksym Kompaniiets
    • 1
  • Oleksandr V. Dobrovolskiy
    • 1
    • 3
  • Cornelia Neetzel
    • 2
  • Wolfgang Ensinger
    • 2
  • Michael Huth
    • 1
  1. 1.Physikalisches InstitutGoethe UniversityFrankfurt am MainGermany
  2. 2.Department of Materials ScienceTU DarmstadtDarmstadtGermany
  3. 3.Physics DepartmentV. Karazin National UniversityKharkivUkraine

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