Voltage tunable photodetecting properties of La0.4Ca0.6MnO3 films grown on miscut LaSrAlO4 substrates

We report the voltage tunable photodetecting properties of a La0.4Ca0.6MnO3 film grown on miscut LaSrAlO4 (001) substrates under ultraviolet pulsed laser irradiation at ambient temperature. The photovoltage and photocurrent peak sensitivities can be tuned in the range of 0.295–0.786 V/mJ and 0.172–0...

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Bibliographic Details
Published in:Applied physics letters 2010-07, Vol.97 (4)
Main Authors: Li, X. M., Zhao, K., Ni, H., Zhao, S. Q., Xiang, W. F., Lu, Z. Q., Yue, Z. J., Wang, F., Kong, Yu-Chau, Wong, H. K.
Format: Article
Language:English
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Summary:We report the voltage tunable photodetecting properties of a La0.4Ca0.6MnO3 film grown on miscut LaSrAlO4 (001) substrates under ultraviolet pulsed laser irradiation at ambient temperature. The photovoltage and photocurrent peak sensitivities can be tuned in the range of 0.295–0.786 V/mJ and 0.172–0.314 A/mJ, respectively, when the applied bias is changed from −20 to +20 V, indicating that the vicinal manganite film can be used as an electric tunable ultraviolet photodetector. A possible mechanism based on the high resolution transmission electron microscopy is introduced to explain the experiment results.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3473781