FMR STUDIES OF CO-70(FEMO)(2)MN-5(BSI)(23) AMORPHOUS RIBBONS - POLISHING EFFECT

The part played by the surface imperfections on C-70(FeMo)(2)Mn-5(BSi) (23) amorphous ribbons due to the planar flow casting process has been pointed out by FMR measurements at 9 and 16 GHz and at 296 K and 77 K on as-quenched and field-annealed samples. From our curves and data w e determine the role played by these macro- and microimperfections thr ough the variations of the g-factor, the damping parameter lambda, the transverse relaxation time T-2 as well as the maximum variations Delt a mu'(M), Delta mu'(m) and Delta mu'(M) of the relative magnetic perme ability mu = mu' - j mu''.