Conductivity Oscillations of Magnetic Multilayers

  • Miguel Kiwi
  • Ana María Llois
  • Ricardo Ramírez
  • Mariana Weissmann


The electrical conductivity of the superlattice systems Ni/Co, Ni/Cu, and Pd/Ag, as a function of layer thickness, is investigated theoretically. Experimentally an oscillatory dependence was found for the first two, while the latter exhibits a monotonous behavior. First, a band theory based calculation is carried out, which fails to yield significant conductivity variations, but which points to the presence of d-character quantum well states close to E F . This, led us to put forward and explore a model Hamiltonian that incorporates a scattering mechanism of these carriers against d-character quantum well states, which are present in only one of the superlattice materials. This latter model yields results in agreement with the magnitude of the experimentally observed oscillations.


Brillouin Zone Fermi Energy Majority Spin Minority Spin Spin Contribution 
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Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • Miguel Kiwi
    • 1
  • Ana María Llois
    • 2
  • Ricardo Ramírez
    • 1
  • Mariana Weissmann
    • 2
  1. 1.Facultad de FísicaPontificia Universidad Católica de ChileSantiago 22Chile
  2. 2.Departamento de FísicaComisión Nacional de Energía AtómicaBuenos AiresArgentina

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