Abstract
We investigate the magnetic damping parameter of Fe1 – xCrx thin films using the time-resolved magneto-optical Kerr effect technique. It is demonstrated that the overall effective damping parameter is enhanced with the increasing Cr concentration. The effective damping at high field α0 is found to be significantly enhanced when increasing the Cr concentration with the α0 = 0.159 in the Fe45Cr55 enhanced by 562% compared with that of α0 = 0.024 in the pure Fe film. This study provides a new approach of controlling the effective damping parameter with a desired magnitude via varying Cr composition.
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