  Electron transport through disordered systems that include spin scatterers is
studied numerically. We consider three kinds of magnetic impurities: the Ising,
the XY and the Heisenberg. By extending the transfer matrix method to include
the spin degree of freedom, the two terminal conductance is calculated. The
variance of conductance is halved as the number of spin components of the
magnetic impurities increases. Application of the Zeeman field in the lead
causes a further halving of the variance under certain conditions.
