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We have investigated the giant magnetoresistance of artificial structures containing metallic Co/Cu/Co and Ni₈₀{Fe}₂₀$/Cu/${Ni}₈₀Fe₂₀ spin-valves confined within insulating antiferromagnetic NiO layers. The observed enhanced magnetoresistance as compared to conventional all-metal spin-valves is interpreted with a semiclassical approach in which specular reflections at the metal/insulator barrier are included.
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Swagten et al. (1996) studied this question.
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