Ferromagnetic Resonance of Amorphous GdEuCo Alloy Films

GdEuCo films were made by RF sputtering with magnetic fields that were either parallel or perpendicular to the film surface. These samples were rotated at right angles to the magnetic field to study the angle dependence of the spin wave resonance. Ferromagnetic resonance measurements were performed in the 9 GHz band at both room and liquid-nitrogen temperatures. H¿ increased gradually with the Eu concentration up to 10 at% where it dropped suddenly. Spin wave resonance was observed for all Eu concentrations (0 ~ 10 at%).