Estitxu Villamor, Miren Isasa, Luis E. Hueso, Fèlix Casanova
A high reproducibility in the performance of cobalt/copper and permalloy/copper lateral spin valves with transparent contacts is obtained by optimizing the interface quality and the purity of copper. This allows us to study comprehensively the spin injection properties of both ferromagnetic materials, as well as the role they play on the spin transport properties of copper. Permalloy is found to be a better spin injector than cobalt due to its higher electrical resistivity. The spin transport properties of copper are not affected by the used ferromagnetic material, leading to large spin diffusion lengths.
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http://arxiv.org/abs/1304.2123
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