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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
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 Sab and Sc are the ab-plane and c-axis Seebeck coefficients.
- Type
- Research Article
- Information
- The European Physical Journal - Applied Physics , Volume 35 , Issue 3 , September 2006 , pp. 173 - 176
- Copyright
- © EDP Sciences, 2006
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