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The Kondo effect in ferromagnetic atomic contacts

Author

Listed:
  • M. Reyes Calvo

    (Facultad de Ciencias, Universidad de Alicante, San Vicente del Raspeig, E-03790 Alicante, Spain)

  • Joaquín Fernández-Rossier

    (Facultad de Ciencias, Universidad de Alicante, San Vicente del Raspeig, E-03790 Alicante, Spain)

  • Juan José Palacios

    (Facultad de Ciencias, Universidad de Alicante, San Vicente del Raspeig, E-03790 Alicante, Spain)

  • David Jacob

    (Rutgers University, Piscataway, New Jersey 08854, USA)

  • Douglas Natelson

    (Rice University, Houston, Texas 77005, USA)

  • Carlos Untiedt

    (Facultad de Ciencias, Universidad de Alicante, San Vicente del Raspeig, E-03790 Alicante, Spain)

Abstract

Shrinking magnets: a new spin on the Kondo effect Magnetism in metals such as iron is typically considered an intrinsic property of the material. But as with many physical effects, such general pictures can break down once you reduce the size of the system to the nanoscale. Calvo et al. report a striking manifestation of such a change: they find that when the diameter of a magnetic wire is reduced to atomic dimensions, the material's magnetic properties are strongly altered, to the point where magnetism can even be eliminated. This is an unexpected realization of the so-called Kondo effect, for which one usually requires two different species of atoms; it also highlights vividly the need to take into account atomic-scale geometry when investigating the properties of magnetic nanostructures.

Suggested Citation

  • M. Reyes Calvo & Joaquín Fernández-Rossier & Juan José Palacios & David Jacob & Douglas Natelson & Carlos Untiedt, 2009. "The Kondo effect in ferromagnetic atomic contacts," Nature, Nature, vol. 458(7242), pages 1150-1153, April.
    • Handle: RePEc:nat:nature:v:458:y:2009:i:7242:d:10.1038_nature07878
    DOI: 10.1038/nature07878
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