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Proof of concept of the idea that Co nanoparticles can be coupled to a Co layer via a Ru spacer layer coupling. As references, the GMR characteristics of a Co3nm/Ru0.8nm/Co4nm layered sample (black curve) and a Co3nm/Ru0.8nm system (blue curve) are given. The resulting GMR curve (red) measured at room temperature of the Co3nm/Ru0.8nm/Co particles (diameter: 12 nm) hybrid system clearly shows a spin-valve character (adapted from [110]).
