Seed influence on the ferromagnetic resonance response of Co/Ni multilayers

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Seed influence on the ferromagnetic resonance response of Co/Ni multilayers
Title:
Seed influence on the ferromagnetic resonance response of Co/Ni multilayers
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Journal of Applied Physics
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Publication Date:
18 February 2014
Citation:
J. Appl. Phys. 115, 17C512 (2014)
Abstract:
The effect of Pd and Ru seed layers on the magnetic properties of [Co/Ni]N multilayers with varying number of bilayer repeats N is investigated using vector network analyzer ferromagnetic resonance. The effective anisotropy field HKeff is found to increase with N for Ru seed, but decreases for Pd until N¼15. As N is increased beyond 15, HKeff decreases for both seeds. In contrast, the damping parameter a decreases with N regardless of the seed, showing a 1/N dependence. Taking spin pumping into account, the intrinsic damping a0 for both Pd and Ru seeds reduce to a0 0.01. These results demonstrate that there can be a strong influence of the seed/Co interface on anisotropy, especially for sufficiently low N, but not necessarily on a0.
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Description:
Copyright (2014) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 115, 17C512 (2014) and may be found at http://dx.doi.org/10.1063/1.4865212.
ISSN:
0021-8979
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