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Energy Express

  • Editor: Bernard Kippelen
  • Vol. 20, Iss. S3 — May. 7, 2012
  • pp: A406–A411

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

Hao Ni, Zengji Yue, Kun Zhao, Wenfeng Xiang, Songqing Zhao, Aijun Wang, Yu-Chau Kong, and Hong-Kuen Wong  »View Author Affiliations

Optics Express, Vol. 20, Issue S3, pp. A406-A411 (2012)

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Magnetically and bias current tunable transient photovoltaic (TPV) responses have been investigated in a manganite-based heterojunction composed of a La2/3Ca1/3MnO3 film 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 μA. These results indicate that the manganite-based heterojunction can be used for magnetically and electrically tunable ultraviolet photodetectors.

© 2012 OSA

OCIS Codes
(250.0250) Optoelectronics : Optoelectronics
(160.5335) Materials : Photosensitive materials
(310.6845) Thin films : Thin film devices and applications

ToC Category:

Original Manuscript: January 18, 2012
Revised Manuscript: March 14, 2012
Manuscript Accepted: March 29, 2012
Published: April 9, 2012

Hao Ni, Zengji Yue, Kun Zhao, Wenfeng Xiang, Songqing Zhao, Aijun Wang, Yu-Chau Kong, and Hong-Kuen Wong, "Magnetical and electrical tuning of transient photovoltaic effects in manganite-based heterojunctions," Opt. Express 20, A406-A411 (2012)

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