Journal
IEEE TRANSACTIONS ON MAGNETICS
Volume 42, Issue 10, Pages 2372-2374Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2006.878813
Keywords
damping constant; ferromagnetic resonance; Ni-Co alloy thin film; Ni-Fe alloy thin film
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Gilbert's damping constants, alpha, of Ni-Fe and Ni-Co thin films are determined by Q-band ferromagnetic resonance (FMR) analysis. alpha is calculated from the resonance width of the FMR spectrum alpha of Ni-85 Fe-15 film is found to be 0.0034, which is one-fourth of those of Ni film (alpha = 0.013) and Co (alpha = 0.013). alpha of the Ni100-x Co-x specimens increases with decreasing the Co concentration from 100 to 68 at %, and the alpha value of Ni-32 Co-68 film has the maximum value of 0.0021. The alpha values of the Ni-Co specimens are nearly the same as those of the Co-Cr-Ta and the Co-Cr-Pt.
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