Temperature dependences of resistivity and magnetoresistivity for half-metallic ferromagnets

2002/04/12 by V. Yu. Irkhin, V.Yu. Irkhin, M.I. Katsnelson +1 · 2 citations
Materials Science · Physics and Astronomy · #Heusler alloys: electronic and magnetic properties #Quantum and electron transport phenomena #Topological Materials and Phenomena #cond-mat.str-el

paper · pdf · doi:10.1140/epjb/e2002-00404-6

published as Eur. Phys. J. B30, 481 (2002) · 6 pages, RevTeX, 2 figures

arxiv created 2002/04/12 · openalex publication_date 2002/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

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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