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Magnetical and electrical tuning of transient photovoltaic effects in manganite-based heterojunctions

Journal Article


Abstract


  • Magnetically and bias current tunable transient photovoltaic (TPV) responses have been investigated in a manganite-based heterojunction composed of a La2/3Ca1/3MnO3film and an n-type Si substrate at ambient temperature. Under irradiation of 248 nm pulsed laser with 20 ns duration the TPV peak values can be modulated in a range of −125 to 138 mV when the applied magnetic field perpendicular to the interface changes from −6.4 to + 6.4 kOe, and the relative variations (TPVH− TPV0)/TPV0 reach up to about 1000%. In addition, TPV responses can be also affected by bias current, and the photoresponse peaks change from positive to negative with the currents from −350 to 350 ¼A. These results indicate that the manganite-based heterojunction can be used for magnetically and electrically tunable ultraviolet photodetectors.

UOW Authors


  •   Ni, Hao (external author)
  •   Yue, Zengji
  •   Zhao, Kun (external author)
  •   Xiang, Wenfeng (external author)
  •   Zhao, Songqing (external author)
  •   Wang, Aijun (external author)
  •   Kong, Qingyu (external author)
  •   Wong, Hong (external author)

Publication Date


  • 2012

Geographic Focus


Citation


  • Ni, H., Yue, Z., Zhao, K., Xiang, W., Zhao, S., Wang, A., Kong, Q. & Wong, H. (2012). Magnetical and electrical tuning of transient photovoltaic effects in manganite-based heterojunctions. Optics Express, 20 (S3), A406-A411.

Scopus Eid


  • 2-s2.0-84861117894

Start Page


  • A406

End Page


  • A411

Volume


  • 20

Issue


  • S3

Place Of Publication


  • United States

Abstract


  • Magnetically and bias current tunable transient photovoltaic (TPV) responses have been investigated in a manganite-based heterojunction composed of a La2/3Ca1/3MnO3film and an n-type Si substrate at ambient temperature. Under irradiation of 248 nm pulsed laser with 20 ns duration the TPV peak values can be modulated in a range of −125 to 138 mV when the applied magnetic field perpendicular to the interface changes from −6.4 to + 6.4 kOe, and the relative variations (TPVH− TPV0)/TPV0 reach up to about 1000%. In addition, TPV responses can be also affected by bias current, and the photoresponse peaks change from positive to negative with the currents from −350 to 350 ¼A. These results indicate that the manganite-based heterojunction can be used for magnetically and electrically tunable ultraviolet photodetectors.

UOW Authors


  •   Ni, Hao (external author)
  •   Yue, Zengji
  •   Zhao, Kun (external author)
  •   Xiang, Wenfeng (external author)
  •   Zhao, Songqing (external author)
  •   Wang, Aijun (external author)
  •   Kong, Qingyu (external author)
  •   Wong, Hong (external author)

Publication Date


  • 2012

Geographic Focus


Citation


  • Ni, H., Yue, Z., Zhao, K., Xiang, W., Zhao, S., Wang, A., Kong, Q. & Wong, H. (2012). Magnetical and electrical tuning of transient photovoltaic effects in manganite-based heterojunctions. Optics Express, 20 (S3), A406-A411.

Scopus Eid


  • 2-s2.0-84861117894

Start Page


  • A406

End Page


  • A411

Volume


  • 20

Issue


  • S3

Place Of Publication


  • United States