  Using He+ ion irradiation, we demonstrate how the magnetodynamic properties
of both ferromagnetic layers in all-perpendicular [Co/Pd]/Cu/[Co/Ni] spin
valves can be tuned by varying the He+ ion fluence. As the perpendicular
magnetic anisotropy of both layers is gradually reduced by the irradiation,
different magnetic configurations can be achieved from all-perpendicular,
through orthogonal, to all in-plane. In addition, both the magnetic damping and
the inhomogeneous broadening of the Co/Ni layer improve substantially with
increasing fluence. GMR of the spin valve is negatively affected and decreases
linearly from an original value of 1.14% to 0.4% at the maximum fluence of
50*10^14 He+/cm^2.
