  We present an ab initio theoretical formalism for the static paramagnetic
spin susceptibility of metals at finite temperatures. Since relativistic
effects, e.g. spin-orbit coupling, are included, we can identify the anisotropy
or easy axes of the spin fluctuations. Our calculations find hcp-iron to be
unstable to in ab-plane, incommensurate anti-ferromagnetic (AFM) modes (linked
to nested Fermi surface) below T_N =69K for the lowest pressures under which it
is stable. T_N swiftly drops to zero as the pressure is increased. The
calculated susceptibility of yttrium is consistent with the helical,
incommensurate AFM order found in many rare-earth-dilute yttrium alloys.
Lastly, in line with experimental data, we find the easy axes of the
incommensurate AFM and ferromagnetic spin fluctuations of the normal state of
the triplet superconductor Sr2RuO4 to be perpendicular and parallel with the
crystal c-axis resepctively.
