Journal
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
Volume 40, Issue 2A, Pages 580-585Publisher
INST PURE APPLIED PHYSICS
DOI: 10.1143/JJAP.40.580
Keywords
ferromagnetic resonance; linewidth; 80NiFe; magnetic inhomogeneities; Gilbert damping parameter
Categories
Ask authors/readers for more resources
The out-of-plane angular dependence of ferromagnetic resonance (FMR) was measured for NM/80NiFe(Py)/NM (NM = Cu, Ta, Pd and Pt) films with various Py, Cu and Ta thicknesses fabricated by magnetron sputtering. The out-of-plane angular dependences of FMR resonance field and linewidth were analyzed using Landau-Lifshitz-Gilbert equation taking account of broadening of linewidth due to magnetic inhomogeneities in a film. Magnetic inhomogeneities were assumed to be the fluctuation of magnitude and direction of the effective demagnetization held which contains both demagnetization and perpendicular anisotropy field for a film. The calculations of the angular variations of linewidth agreed with the experimental ones quantitatively. The fluctuations of magnitude and direction of the effective demagnetization field, which are represented as Delta (4 pi M-eff.) and Delta theta (H), respectively, increased with decreasing Py thickness for all NM/Py/NM films, Delta theta (H) increased as the thicknesses of the buffer layers increased for Cu/Py(40 Angstrom)/Cu films and was almost constant with increasing buffer layer thickness for Ta/Py(40 Angstrom)/Ta films. Only in the case of NM = Pd and Pt films, the Gilbert damping parameter, which is the speed of decay of magnetization precession, was enhanced significantly as compared with that for the bulk sample and was dependent on Py thickness.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available