FERROMAGNETIC-RESONANCE AND X-RAY-DIFFRACTION INVESTIGATIONS OF ION-IRRADIATED AG FE/AG-(001)-FILMS/

High fluence implantation of 95-keV Fe-ion in epitaxial Ag/Fe 200 Angs trom/Ag-(001)-multilayers were performed to induce structural modifica tions. The correlation between structural quality and magnetic propert ies was investigated by measurements with ferromagnetic resonance (FMR ) and out-of-plane x-ray-diffraction techniques (XRD). The FMR results show for fluences up to 10(15) cm(-2) a decrease of the crystalline- and perpendicular-uniaxial anisotropies, which are cm attributed to st rain relaxation due to the ion-irradiation detected with XRD. From the se results the magnetoelastic coefficient B-1 is determined to -3 x 10 (6) J/m(3). At higher fluences of 10(16) cm(-2) we observe a strong re duction of the perpendicular-uniaxial anisotropy and a change of the c rystalline anisotropy from cubic towards that of a tetragonal symmetry . Further, increasing fluences lead to a lattice widening above the Fe -bulk value and an increase of the interface roughness. (C) 1997 Ameri can Institute of Physics.