https://doi.org/10.1140/epjb/e2002-00404-6
Temperature dependences of resistivity and magnetoresistivity for half-metallic ferromagnets
1
Institute of Metal Physics, 620219 Ekaterinburg, Russia
2
Department of Physics, Uppsala University, Box 530, 751 21 Uppsala, Sweden
Received:
16
September
2002
Revised:
6
November
2002
Published online:
31
December
2002
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 
for 
and to 
for 
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
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
