Ferromagnetic resonance investigation of nanocrystalline FeCuNbSiB |
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Authors: | G. A. Basheed S. N. Kaul |
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Affiliation: | (1) School of Physics, University of Hyderabad, 500 046 Hyderabad, India |
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Abstract: | 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 MS, (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 |
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Keywords: | Ferromagnetic resonance nanocrystalline soft magnetic alloys spin-waves magnetocrystalline anisotropy line-width |
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