Abstract

The structural and magnetic properties of Fe/Cr and Fe/Ag magnetic superlattices are discussed. The presence of antiferromagnetic coupling in Fe/Cr superlattices was clearly established, whereas Fe/Ag superlattices do not show antiferromagnetic coupling in their as-prepared state. Thermal annealing and ion irradiation lead to an increase of the magnetoresistance due to the formation of a granular FeAg alloy and a Kondo system, respectively.

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