中国物理B ›› 2018, Vol. 27 ›› Issue (9): 97202-097202.doi: 10.1088/1674-1056/27/9/097202

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Thermal stability of the spin injection in Co/Ag/Co lateral spin valves

Le Wang(王乐), Lu-Chen Chen(陈鹭琛), Wen-Yu Liu(刘雯雨), Shuo Han(韩烁), Weiwei Wang(王伟伟), Zhanjie Lu(卢占杰), Shan-Shan Chen(陈珊珊)   

  1. 1 Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Natual Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China;
    2 Department of Physics, Xiamen University, Xiamen 361005, China
  • 收稿日期:2018-03-29 修回日期:2018-06-03 出版日期:2018-09-05 发布日期:2018-09-05
  • 通讯作者: Shan-Shan Chen E-mail:schen@ruc.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11304381 and 11374244), the Research Funds of Renmin University of China (Grant No. 17XNLF02), the Foundation for the Author of National Excellent Doctoral Dissertation of China (Grant No. 201443), and the Natural Science Foundation of Fujian Province of China (Grant No. 2015J06016).

Thermal stability of the spin injection in Co/Ag/Co lateral spin valves

Le Wang(王乐)1, Lu-Chen Chen(陈鹭琛)1, Wen-Yu Liu(刘雯雨)1, Shuo Han(韩烁)1, Weiwei Wang(王伟伟)1,2, Zhanjie Lu(卢占杰)1, Shan-Shan Chen(陈珊珊)1   

  1. 1 Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Natual Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China;
    2 Department of Physics, Xiamen University, Xiamen 361005, China
  • Received:2018-03-29 Revised:2018-06-03 Online:2018-09-05 Published:2018-09-05
  • Contact: Shan-Shan Chen E-mail:schen@ruc.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11304381 and 11374244), the Research Funds of Renmin University of China (Grant No. 17XNLF02), the Foundation for the Author of National Excellent Doctoral Dissertation of China (Grant No. 201443), and the Natural Science Foundation of Fujian Province of China (Grant No. 2015J06016).

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摘要：

Spin injection, spin diffusion, and spin detection are investigated in Co/Ag/Co lateral spin valves at room temperature. Clear spin accumulation signals are detected by the non-local measurement. By fitting the results to the one-dimensional diffusion equation,~8.6% spin polarization of the Co/Ag interface and ~180 nm spin diffusion length in Ag are obtained. Thermal treatment results show that the spin accumulation signal drastically decreases after 100 ℃ annealing, and disappears under 200 ℃ annealing. Our results demonstrate that, compared to the spin diffusion length, the decrease and the disappearance of the spin accumulation signal are mainly dominated by the variation of the interfacial spin polarization of the Co/Ag interface.

关键词: spin injection, spin diffusion length, Co/Ag contact, lateral spin valve

Abstract:

Spin injection, spin diffusion, and spin detection are investigated in Co/Ag/Co lateral spin valves at room temperature. Clear spin accumulation signals are detected by the non-local measurement. By fitting the results to the one-dimensional diffusion equation,~8.6% spin polarization of the Co/Ag interface and ~180 nm spin diffusion length in Ag are obtained. Thermal treatment results show that the spin accumulation signal drastically decreases after 100 ℃ annealing, and disappears under 200 ℃ annealing. Our results demonstrate that, compared to the spin diffusion length, the decrease and the disappearance of the spin accumulation signal are mainly dominated by the variation of the interfacial spin polarization of the Co/Ag interface.

Key words: spin injection, spin diffusion length, Co/Ag contact, lateral spin valve

中图分类号:  (Electrical injection of spin polarized carriers)

  • 72.25.Hg
72.25.Ba (Spin polarized transport in metals)