3 research outputs found
Giant magnetoresistance in quantum magnetic contacts
We present calculations of quantized conductance and magnetoresistance in
nanosize point contacts between two ferromagnetic metals. When conductance is
open for only one conduction electrons spin-projection, the magnitude of
magnetoresistance is limited by the rate of conduction electron spin-reversal
processes. For the case when both spin-channels contribute to the conductance
we analyze the influence of the point contact cross-section asymmetry on the
giant megnetoresistance. Recent experiments on magnetoresistance of magnetic
point contacts are discussed in the framework of the developed theory.Comment: 11 pages, TEX, 2 Figures. Journ. Magn. Magn. Mater. (2002) submitte