Ferromagnetic resonance in epitaxial FePd thin films with perpendicular anisotropy

Ferromagnetic resonance (FMR) investigations on epitaxial partially ordered FePd thin films with a perpendicular magnetic anisotropy (PMA) are present ed. The measurements have been performed over a wide frequency range (6-18 GHz) in the monodomain state. Besides the determination of magnetic paramet ers (anisotropy constants, gyromagnetic ratio), two main results emerge: (i ) the occurrence of well-resolved perpendicular standing spin-wave resonanc es which depart from the n(2)-law, (ii) the perpendicular uniform resonance linewidth was found to be independent of frequency over the (6-18 GHz) ran ge. These results are discussed in terms of weak volume inhomogeneities (an isotropy, defects) induced by the film growth process. (C) 1999 Elsevier Sc ience B.V. All rights reserved.