Abstract
We investigated the temperature and Co layer thickness dependences of damping in exchange-biased Ta/Co/IrMn/Ta films. No matter how the Co layer thickness or temperature changes, the damping exhibits anisotropic characteristics, and the damping anisotropy basically satisfies the linear relationship with the exchange bias field. This phenomenon is attributed to the direct exchange coupling at the Co/IrMn interface. As the temperature decreases, the damping goes through a process of first increasing and then decreasing. These results extend the variable temperature study of anisotropic damping to the lower temperature range, and helps us better understand anisotropic damping.
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