Springer, Pramana - Journal of Physics, 5(65), p. 841-846, 2005
DOI: 10.1007/bf02704083
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An elaborate line-shape analysis of the ferromagnetic resonance (FMR) spectra taken in the temperature range 100 K to 350 K on amorphous FeCuNbSiB alloys before and after nanocrystallizing them reveals that in the nanocrystalline state, (i) spin wave stiffness (D) is enhanced while the saturation magnetization, M S , is reduced, (ii) both the 'in-plane' anisotropy field, H K , as well as the FMR line-width scale with M S , (iii) the single-ion anisotropy of spin-orbit plus crystal field origin dominates over the twoion anisotropy of dipolar origin and (iv) multi-magnon scattering contributions to FMR line-width become important in some cases.