Effects of Ar-ion implantation and thermal treatment on magnetic properties of Co/Pd multilayers: a ferromagnetic resonance study

The volume and surface anisotropies of Co/Pd multilayers have been studied by ferromagnetic resonance (FMR) and vibrating sample magnetometer (VSM) me asurements for different layer thicknesses and as a function of thermal tre atment and before and after ion implantation. A second resonance mode was o bserved for some samples depending on the layer thicknesses. Exposing the s amples to a thermal treatment and to Ar+-ion implantation, the observed cha nges of the effective anisotropy field are consistent to the idea that both processes cause a deterioration of the ML structure. No significant differ ences in the FMR magnetic parameters are found if the ML are grown either o n glass or on Si(111) substrates apart from a change of the linewidth due t o changes in texture homogeneity. (C) 1999 Elsevier Science B.V. All rights reserved.