Search

Gilbert's damping constants, α, of Ni-Fe and Ni-Co thin films are determined by Q-band ferromagnetic resonance (FMR) analysis. α is calculated from the resonance width of the FMR spectrum. α of Ni85 Fe15 film is found to be 0.0034, which is one-fourth of those of Ni film (α = 0.013) and Co (α = 0.013). α of the Ni100-x Cox specimens increases with decreasing the Co concentration from 100 to 68 at%, and the α value of Ni32 Co68 film has the maximum value of 0.0021. The a values of the Ni-Co specimens are nearly the same as those of the Co-Cr-Ta and the Co-Cr-Pt. [ABSTRACT FROM AUTHOR]