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Temperature dependences of resistivity and magnetoresistivity for half-metallic ferromagnets

  • V.Yu. Irkhin
  • M.I. Katsnelson

Abstract:

Peculiarities of transport properties of three- and two-dimensional half-metallic ferromagnets are investigated, which are connected with the absence of spin-flip scattering processes. The temperature and magnetic field dependences of resistivity in various regimes are calculated. The resistivity is proportional to T9/2 for T < T* and to T7/2 for T > T*, T* being the crossover temperature for longitudinal scattering processes. The latter scale plays also an important role in magnetoresistance. The contribution of non-quasiparticle (incoherent) states to the transport properties is discussed. It is shown that they can dominate in the temperature dependence of the impurity-induced resistivity and in the tunnel junction conductivity.

PACS. 72.10.Di Scattering by phonons, magnons, and other nonlocalized excitations – 72.25.Ba Spin polarized transport in metals – 75.50.Cc Other ferromagnetic metals and alloys 

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Copyright information

© EDP Sciences, Springer-Verlag 2002

Authors and Affiliations

  • V.Yu. Irkhin
    • 1
  • M.I. Katsnelson
    • 1
  1. 1.Institute of Metal Physics, 620219 Ekaterinburg, RussiaRU

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