Spin injection properties in trilayer graphene lateral spin valves

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

doi:10.1063/1.4776699

Spin injection properties in trilayer graphene lateral spin valves

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

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

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 language	English
Article number	033105
Journal	Applied Physics Letters
Volume	102
Issue number	3
DOIs	https://doi.org/10.1063/1.4776699
Publication status	Published - 2013 Jan 21
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Spin injection properties in trilayer graphene lateral spin valves",

abstract = "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.",

author = "Liu, {Y. P.} and H. Idzuchi and Y. Fukuma and O. Rousseau and Y. Otani and Lew, {W. S.}",

note = "Funding Information: This work was supported by the NRF-CRP program (Multifunctional Spintronic Materials and Devices). The authors thank Sun Li and Sugimoto Satoshi for their assistance in experimental measurements, and Dr. Aoki for his helpful discussion. ",

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T1 - Spin injection properties in trilayer graphene lateral spin valves

AU - Liu, Y. P.

AU - Idzuchi, H.

AU - Fukuma, Y.

AU - Rousseau, O.

AU - Otani, Y.

AU - Lew, W. S.

N1 - Funding Information: This work was supported by the NRF-CRP program (Multifunctional Spintronic Materials and Devices). The authors thank Sun Li and Sugimoto Satoshi for their assistance in experimental measurements, and Dr. Aoki for his helpful discussion.

PY - 2013/1/21

Y1 - 2013/1/21

N2 - 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.

AB - 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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Spin injection properties in trilayer graphene lateral spin valves

Abstract

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