  On the basis of the Hubbard model, we extend the fluctuation-exchange (FLEX)
approach to investigating the properties of antiferromagnetic (AF) phase in
electron-doped cuprate superconductors. Furthermore, by incorporating the
effect of scatterings due to the disordered dopant-atoms into the FLEX
formalism, our numerical results show that the antiferromagnetic transition
temperature, the onset temperature of pseudogap due to spin fluctuations, the
spectral density of the single particle near the Fermi surface, and the
staggered magnetization in the AF phase as a function of electron doping can
consistently account for the experimental measurements.
