Eur. Phys. J. Appl. Phys.
Volume 35, Number 3, September 2006
|Page(s)||173 - 176|
|Section||Surfaces, Interfaces and Films|
|Published online||13 July 2006|
Anomalous photovoltaic effect in Las0.8Sr0.2MnO3 films grown on SrTiO3(001) substrates by laser molecular beam epitaxy
Department of Mathematics and Physics, China University
of Petroleum, Beijing 102249, P.R. China
2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
3 International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, P.R. China
4 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P.R. China
Corresponding author: email@example.com
Revised: 24 March 2006
Accepted: 19 May 2006
Published online: 13 July 2006
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 V/K, where Sab and Sc are the ab-plane and c-axis Seebeck coefficients.
PACS: 72.40.+w – Photoconduction and photovoltaic effects / 78.20.-e – Optical properties of bulk materials and thin films
© EDP Sciences, 2006
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