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Damping phenomena in Co90Fe10/Ni multilayers and alloys
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Examples of the experimental data and fits for the (a) imaginary and (b) real parts of the VNA-FMR spectra. (c) Plots of the resonance field versus frequency for several 6.3 nm ML films. (d) Plots of the field swept linewidth versus frequency used to determine α for the same samples used in (c).

Image of FIG. 2.
FIG. 2.

(Color online) (a) Examples of XRD spectra taken from the (111) peak. The vertical lines show the ideal peak location for Cu, Co90Fe10, and Ni. (b) The measured lattice constants of the MLs and alloys are plotted as a function of Co90Fe10 concentration. The bottom line is the ideal lattice constant for the Co90Fe10-Ni layer assuming a weighted average with the concentration. The upper two lines are the ideal lattice constants that include the Cu in the system for both the 6.3 nm and 10 nm cases. (c) Specular and diffuse XRR spectra for a ML sample showing the superlattice peak.

Image of FIG. 3.
FIG. 3.

(Color online) Plots of (a) Meff , (b) g, and (c) α as a function of Co90Fe10 concentration for the MLs and alloys. The three curve in (c) are the spin-density weighted average damping αavg , where we used the measured values of α for 6.3 nm and 10 nm films of both Co90Fe10 and Ni films. In addition, we used the extrapolated values of α for bulk (infinite) thickness films of Co90Fe10 and Ni. Error bars are included in the data, but are most often much smaller than the data points themselves.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Damping phenomena in Co90Fe10/Ni multilayers and alloys