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Anomalous photovoltaic effect in Las0.8Sr0.2MnO3 films grown on SrTiO3(001) substrates by laser molecular beam epitaxy

Published online by Cambridge University Press:  13 July 2006

Kun Zhao
Affiliation:
Department of Mathematics and Physics, China University of Petroleum, Beijing 102249, P.R. China Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, P.R. China
Hui-bin Lu
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
Meng He
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
Yan-hong Huang
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
Kui-juan Jin
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
Zheng-hao Chen
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
Yue-liang Zhou
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
Guo-zhen Yang
Affiliation:
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
Xiu-liang Ma
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P.R. China
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Abstract

Transient laser-induced anomalous photovoltaic effect has been studied in La0.8Sr0.2MnO3 films grown on the SrTiO3 (001) substrates by laser molecular beam epitaxy. It is demonstrated that the signal polarity is reversed when the films are irradiated through the substrate rather than at the air/film interface. The microstructures in these films are clarified in terms of the oriented microdomains with their (101) plane parallel to the substrate surface, suggesting off-diagonal Seebeck effect plays an important role for our observation. From the results, we obtain the anisotropy of the thermoelectric power $\Delta S=S_{ab}-S_{c}=0.3~\mu$ V/K, where S ab and S c are the ab-plane and c-axis Seebeck coefficients.

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Research Article
Copyright
© EDP Sciences, 2006

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Anomalous photovoltaic effect in Las0.8Sr0.2MnO3 films grown on SrTiO3(001) substrates by laser molecular beam epitaxy
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Anomalous photovoltaic effect in Las0.8Sr0.2MnO3 films grown on SrTiO3(001) substrates by laser molecular beam epitaxy
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Anomalous photovoltaic effect in Las0.8Sr0.2MnO3 films grown on SrTiO3(001) substrates by laser molecular beam epitaxy
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