  The irradiation with the 10 ns pulsed infrared Nd:YAG laser was applied to
transform FePdCu multilayers into chemically ordered L10 phase. The X-ray
diffraction methods (Theta/2Theta scan, psi-scan, omega-scan) were used to
trace the presence of L10 phase after laser annealing with different number of
pulses. The size and shape of crystallites was determined depending on their
orientation with respect to film plane. The (111) oriented crystallites of
constituent metals were built as coherent domains spreading through multilayers
during deposition of films. Laser annealing induced the transformation of
multilayers to alloy, and the ordering of (111) oriented crystallites.
Simultaneously, the (002) oriented crystallites appeared confirming the
transformation to L10 alloy.
