中国物理B ›› 2007, Vol. 16 ›› Issue (3): 840-842.doi: 10.1088/1009-1963/16/3/047

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Reversal transient laser-induced voltages in La2/3Ca1/3MnO3 films

何萌1, 吕惠宾1, 赵昆2   

  1. (1)Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; (2)Department of Mathematics and Physics, China University of Petroleum, Beijing 102249, China;Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;International Center for Materi
  • 收稿日期:2006-08-19 修回日期:2006-10-10 出版日期:2007-03-20 发布日期:2007-03-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos~60576015 and 50672132).

Reversal transient laser-induced voltages in La2/3Ca1/3MnO3 films

Zhao Kun(赵昆)a)b)c) † , He Meng(何萌)b), and LüHui-Bin(吕惠宾)b)   

  1. a Department of Mathematics and Physics, China University of Petroleum, Beijing 102249, China; b Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; c International Center for MateriInternational Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2006-08-19 Revised:2006-10-10 Online:2007-03-20 Published:2007-03-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos~60576015 and 50672132).

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摘要： This paper reports that the transient laser-induced voltages have been observed in La2/3Ca1/3MnO3 thin films on MgO (001) in the absence of an applied current. A peak voltage of \sim 0.15 V was detected in response to 0.015 J pulse of 308 nm laser. It is demonstrated that the signal polarity is reversed when the films are irradiated through the substrate rather than at the air/film interface. Off-diagonal thermoelectricity may support the inversion of the signal when the irradiation direction is reversed.

关键词: manganite oxide, thin film, photovoltaic effect

Abstract: This paper reports that the transient laser-induced voltages have been observed in La2/3Ca1/3MnO3 thin films on MgO (001) in the absence of an applied current. A peak voltage of $\sim$ 0.15 V was detected in response to 0.015 J pulse of 308 nm laser. It is demonstrated that the signal polarity is reversed when the films are irradiated through the substrate rather than at the air/film interface. Off-diagonal thermoelectricity may support the inversion of the signal when the irradiation direction is reversed.

Key words: manganite oxide, thin film, photovoltaic effect

中图分类号:  (Photoconduction and photovoltaic effects)

  • 73.50.Pz
73.50.Lw (Thermoelectric effects) 73.61.Ng (Insulators)