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International Journal of Photoenergy
Volume 2012 (2012), Article ID 547591, 5 pages
http://dx.doi.org/10.1155/2012/547591
Research Article

Polarity Switchable Photovoltages in Miscut La0.67Ca0.33MnO3 Films

1State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
2College of Science, China University of Petroleum, Beijing 102249, China
3Department of Physics, Chinese University of Hong Kong, Hong Kong
4International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China

Received 26 May 2011; Accepted 19 October 2011

Academic Editor: Vincenzo Augugliaro

Copyright © 2012 J. Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We report the transient laser-induced anomalous photovoltaic effect in the La0.67Ca0.33MnO3 film grown on miscut LaSrAlO4 (001) substrate under 248 nm pulsed laser irradiation at ambient temperature without any applied bias. A photovoltaic pulse signal was observed when the La0.67Ca0.33MnO3 film was irradiated directly, and the signal polarity was reversed when the sample was irradiated through the LaSrAlO4 substrate, while the signal recorded between the two electrodes on the surface of LaSrAlO4 was not reversed when the sample was irradiated through La0.67Ca0.33MnO3 film rather than at the surface of LaSrAlO4. The switchable signal polarity provides a potential application of miscut manganite films as optical components. A possible mechanism is introduced to explain the experiment results.