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 T 9/2 for T < T * and to T 7/2 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.
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Received 16 September 2002 / Received in final form 6 November 2002 Published online 31 December 2002
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Irkhin, V., Katsnelson, M. Temperature dependences of resistivity and magnetoresistivity for half-metallic ferromagnets. Eur. Phys. J. B 30, 481–486 (2002). https://doi.org/10.1140/epjb/e2002-00404-6
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DOI: https://doi.org/10.1140/epjb/e2002-00404-6