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Magnetic-field-free terahertz emission from a magnetic tunneling junction

Journal Article


Abstract


  • Recently, ferromagnetic (FM) heterostructures have been demonstrated to emit THz radiation induced by femtosecond laser pulses. In such spintronic THz emitters, an in-plane external magnetic field is technological required to assist the orientations of the magnetization, which could be an obstacle for practical micro-electrooptic applications. Here, as a proof-of-concept, THz generation is based on the inverse spin Hall effect of the FM/Ta within a magnetic tunneling junction (MTJ) without external magnetic field. Furthermore, THz emission can be engineered by modulating of the tunneling conductivity within a photoexcited MTJ as the relative magnetizations of two FM layers change their alignments.

Authors


  •   Li, Jugeng (external author)
  •   Jin, Zuanming (external author)
  •   Song, Bangju (external author)
  •   Zhang, Shunnong (external author)
  •   Guo, Chenyang (external author)
  •   Wan, Caihua (external author)
  •   Han, Xiufeng (external author)
  •   Cheng, Zhenxiang
  •   Chao Zhang
  •   Lin, Xian (external author)
  •   Ma, Guohong (external author)
  •   Yao, Jianquan (external author)

Publication Date


  • 2019

Citation


  • Li, J., Jin, Z., Song, B., Zhang, S., Guo, C., Wan, C., Han, X., Cheng, Z., Zhang, C., Lin, X., Ma, G. & Yao, J. (2019). Magnetic-field-free terahertz emission from a magnetic tunneling junction. Japanese Journal of Applied Physics, 58 (9), 090913-1-090913-5.

Scopus Eid


  • 2-s2.0-85072809543

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3831

Start Page


  • 090913-1

End Page


  • 090913-5

Volume


  • 58

Issue


  • 9

Place Of Publication


  • United Kingdom

Abstract


  • Recently, ferromagnetic (FM) heterostructures have been demonstrated to emit THz radiation induced by femtosecond laser pulses. In such spintronic THz emitters, an in-plane external magnetic field is technological required to assist the orientations of the magnetization, which could be an obstacle for practical micro-electrooptic applications. Here, as a proof-of-concept, THz generation is based on the inverse spin Hall effect of the FM/Ta within a magnetic tunneling junction (MTJ) without external magnetic field. Furthermore, THz emission can be engineered by modulating of the tunneling conductivity within a photoexcited MTJ as the relative magnetizations of two FM layers change their alignments.

Authors


  •   Li, Jugeng (external author)
  •   Jin, Zuanming (external author)
  •   Song, Bangju (external author)
  •   Zhang, Shunnong (external author)
  •   Guo, Chenyang (external author)
  •   Wan, Caihua (external author)
  •   Han, Xiufeng (external author)
  •   Cheng, Zhenxiang
  •   Chao Zhang
  •   Lin, Xian (external author)
  •   Ma, Guohong (external author)
  •   Yao, Jianquan (external author)

Publication Date


  • 2019

Citation


  • Li, J., Jin, Z., Song, B., Zhang, S., Guo, C., Wan, C., Han, X., Cheng, Z., Zhang, C., Lin, X., Ma, G. & Yao, J. (2019). Magnetic-field-free terahertz emission from a magnetic tunneling junction. Japanese Journal of Applied Physics, 58 (9), 090913-1-090913-5.

Scopus Eid


  • 2-s2.0-85072809543

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3831

Start Page


  • 090913-1

End Page


  • 090913-5

Volume


  • 58

Issue


  • 9

Place Of Publication


  • United Kingdom