Edwards, E.
, Nembach, H.
and Shaw, J.
(2019),
Co<sub>25</sub>Fe<sub>75</sub> Thin Films with Ultralow Total Damping, Physical Review Applied, [online], https://doi.org/10.1103/PhysRevApplied.11.054036
(Accessed December 13, 2024)
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Co25Fe75 Thin Films with Ultralow Total Damping
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Abstract
We measure the dynamic properties of Co25Fe75 thin films grown by dc magnetron sputtering. Using ferromagnetic resonance spectroscopy, we demonstrate an ultralow total damping parameter in the out-of-plane configuration of < 0.0013, whereas for the in-plane configuration we find a minimum total damping of < 0.0020. In both cases, we observe low inhomogeneous linewidth broadening in macroscopic films. We observe a minimum full-width half-maximum linewidth of 1 mT at 10 GHz resonance frequency for a 12 nm thick film. We characterize the morphology and structure of these films as a function of seed layer combinations and find large variation of the qualitative behavior of the in-plane linewidth vs. resonance frequency. Finally, we use wavevector-dependent Brillouin light scattering spectroscopy to characterize the spin-wave dispersion at wave vectors up to 23 υm-1.Citation
Physical Review Applied
Volume
11
Pub Type
Journals
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Keywords
Magnetization dynamics, spintronics, magnonics, magnetic materials, wavevector, Brillouin light scattering spectroscopy
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Created May 13, 2019, Updated June 16, 2020