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Annealing effect on the recovery of training effect in FeOx-CoFe polycrystalline systems

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3 Author(s)
Zhang, K. ; Dept. of Phys. & Astron., Alabama Univ., Tuscaloosa, AL, USA ; Zhao, T. ; Fujiwara, H.

Recovery, by low-temperature (70°C) annealing, of switching fields and training effect of a trained FeOx(α-Fe2O3 with a fraction of Fe0.98O)(70 nm)-CoFe(5 nm) bilayer sample has been investigated. The recovery curve of the switching field in the direction opposite to the pinned direction was well fitted to a curve of a single activation energy response curve for about 1 eV. The training effect was also found to recover by annealing to some extent, but not as much as the switching field. Those results have been explained by a different mechanism from the thermal spin-flip mechanism contributing to the training effect itself.

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Magnetics, IEEE Transactions on  (Volume:38 ,  Issue: 5 )