Anomalous photovoltaic effect in La0.8Sr0.2MnO3. lms grown on SrTiO3 (001) substrates by laser molecular beam epitaxy

作者：Zhao Kun^*; Lu Hui bin; He Meng; Huang Yan hong; Jin Kui juan; Chen Zheng hao; Zhou Yue liang; Yang Guo zhen; Ma Xiu liang

来源：The European Physical Journal - Applied Physics, 2006, 35(3): 173-176.

DOI：10.1051/epjap:2006085

Transient laser-induced anomalous photovoltaic effect has been studied in La0.8Sr0.2MnO3. lms grown on the SrTiO3 (001) substrates by laser molecular beam epitaxy. It is demonstrated that the signal polarity is reversed when the. lms are irradiated through the substrate rather than at the air/.lm interface. The microstructures in these. lms 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.

• 出版日期2006-9
• 单位中国科学院; 中国科学院金属研究所; 中国石油大学（北京）