We report on the electrical injection and detection of spin accumulation in trilayer-graphene/MgO/Permalloy lateral spin-valve (LSV) structure. Non-local spin valve signal is clearly observed in the LSV, indicating that spin coherence extends underneath all ferromagnetic contacts. We also show that low-resistivity graphene/MgO/Py junctions enable efficient spin injection and detection in LSV with high applied current density, which leads to large spin accumulation of 120 μV at room temperature. A spin diffusion length of 1.5 μm was obtained for the injector-detector separation dependence of spin valve signal measurements carried out at room temperature, while at T = 10 K, the diffusion length increases to 2.3 μm.
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Research Article| January 23 2013
Spin injection properties in trilayer graphene lateral spin valves
Y. P. Liu;
Y. P. Liu, H. Idzuchi, Y. Fukuma, O. Rousseau, Y. Otani, W. S. Lew; Spin injection properties in trilayer graphene lateral spin valves. Appl. Phys. Lett. 21 January 2013; 102 (3): 033105. https://doi.org/10.1063/1.4776699
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