Spin injection properties in trilayer graphene lateral spin valves

被引:22
|
作者
Liu, Y. P. [1 ,2 ]
Idzuchi, H. [2 ,3 ]
Fukuma, Y. [2 ,4 ]
Rousseau, O. [2 ]
Otani, Y. [2 ,3 ]
Lew, W. S. [1 ]
机构
[1] Nanyang Technol Univ, Sch Phys & Math Sci, Singapore 637371, Singapore
[2] RIKEN, Adv Sci Inst, Wako, Saitama 3510198, Japan
[3] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
[4] Kyushu Inst Technol, Frontier Res Acad Young Researchers, Iizuka, Fukuoka 8208502, Japan
关键词
TRANSPORT; METAL; ACCUMULATION; PRECESSION; RESISTANCE; BEHAVIOR;
D O I
10.1063/1.4776699
中图分类号
O59 [应用物理学];
学科分类号
摘要
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 mu V at room temperature. A spin diffusion length of 1.5 mu m 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 mu m. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4776699]
引用
收藏
页数:4
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