Electrical detection of spin pumping in van der Waals ferromagnetic Cr2Ge2Te6 with low magnetic damping

Hongjun Xu, Ke Jia, Yuan Huang, Fanqi Meng, Qinghua Zhang, Yu Zhang, Chen Cheng, Guibin Lan, Jing Dong, Jinwu Wei, Jiafeng Feng, Congli He, Zhe Yuan, Mingliang Zhu, Wenqing He, Caihua Wan, Hongxiang Wei, Shouguo Wang, Qiming Shao, Lin Gu, Michael Coey, Youguo Shi, Guangyu Zhang, Xiufeng Han and Guoqiang Yu ()
Additional contact information
Hongjun Xu: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Ke Jia: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Yuan Huang: Beijing Institute of Technology
Fanqi Meng: Tsinghua University
Qinghua Zhang: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Yu Zhang: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Chen Cheng: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Guibin Lan: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Jing Dong: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Jinwu Wei: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Jiafeng Feng: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Congli He: Beijing Normal University
Zhe Yuan: Beijing Normal University
Mingliang Zhu: Chinese Academy of Sciences
Wenqing He: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Caihua Wan: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Hongxiang Wei: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Shouguo Wang: Anhui University
Qiming Shao: Hong Kong University of Science and Technology
Lin Gu: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Michael Coey: Trinity College
Youguo Shi: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Guangyu Zhang: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Xiufeng Han: University of Chinese Academy of Sciences, Chinese Academy of Sciences
Guoqiang Yu: University of Chinese Academy of Sciences, Chinese Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract The discovery of magnetic order in atomically-thin van der Waals materials has strengthened the alliance between spintronics and two-dimensional materials. An important use of magnetic two-dimensional materials in spintronic devices, which has not yet been demonstrated, would be for coherent spin injection via the spin-pumping effect. Here, we report spin pumping from Cr2Ge2Te6 into Pt or W and detection of the spin current by inverse spin Hall effect. The magnetization dynamics of the hybrid Cr2Ge2Te6/Pt system are measured, and a magnetic damping constant of ~ 4–10 × 10−4 is obtained for thick Cr2Ge2Te6 flakes, a record low for ferromagnetic van der Waals materials. Moreover, a high interface spin transmission efficiency (a spin mixing conductance of 2.4 × 1019/m2) is directly extracted, which is instrumental in delivering spin-related quantities such as spin angular momentum and spin-orbit torque across an interface of the van der Waals system. The low magnetic damping that promotes efficient spin current generation together with high interfacial spin transmission efficiency suggests promising applications for integrating Cr2Ge2Te6 into low-temperature two-dimensional spintronic devices as the source of coherent spin or magnon current.

Date: 2023
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DOI: 10.1038/s41467-023-39529-8

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