  We have calculated Heisenberg exchange parameters for bcc-Fe, fcc-Co, and
fcc-Ni using the scalar-relativistic spin-polarized Green function technique
within the tight-binding linear muffin-tin orbital method and by employing the
magnetic force theorem to calculate total energy changes associated with a
local rotation of magnetization directions. We have also determined spin-wave
stiffness constants and found the dispersion curves for metals in question
employing the Fourier transform of calculated Heisenberg exchange parameters.
Curie temperatures were calculated both in the mean-field approximation and
within the Green function random phase approximation. The latter results were
found to be in a better agreement with available experimental data.
