Spin injection properties in trilayer graphene lateral spin valves

Y. P. Liu, H. Idzuchi, Y. Fukuma, O. Rousseau, Y. Otani, W. S. Lew

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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.

Original languageEnglish
Article number033105
JournalApplied Physics Letters
Issue number3
Publication statusPublished - 2013 Jan 21
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Liu, Y. P., Idzuchi, H., Fukuma, Y., Rousseau, O., Otani, Y., & Lew, W. S. (2013). Spin injection properties in trilayer graphene lateral spin valves. Applied Physics Letters, 102(3), [033105]. https://doi.org/10.1063/1.4776699