We report large magnetoresitance (MR) ratios in dual spin-valves of α-Fe2O3/Co/Cu/Co/Cu/Co/α-Fe2O3 and α-Fe2O3/Co/Cu/Co/Cu/Co/IrMn. The MR ratios of the spin-valves are 27.8% for the former and 20.9% for the latter. The larger GMR in the α-Fe2O3 top spin-valve implies the evidence of the specular reflections at the Co/α-Fe2O3 interfaces.
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Sugita et al. (1999) studied this question.
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