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Title
Japanese: 
English:Parallel syntheses and thermoelectric properties of Ce-doped SrTiO3 thin films 
Author
Japanese: 山田 康浩, 大友 明, 川崎 雅司.  
English: Y. F. Yamada, A. Ohtomo, M. Kawasaki.  
Language English 
Journal/Book name
Japanese: 
English:Applied Surface Science 
Volume, Number, Page Vol. 254    No. 3    pp. 768-771
Published date Nov. 2007 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
File
Official URL <Go to ISI>://000253487400021
 
DOI http://dx.doi.org/10.1016/j.apsusc.2007.04.089
Abstract Thermoelectric properties of single crystalline CexSr1-xTiO3 films (0 <= x <= 0.5) have been studied by using combinatorial pulsed-laser deposition. Temperature gradient method was used for identifying an optimum growth temperature for SrTiO3 homoepitaxial growth, at which both oxygen stoichiometry and persisting layer-by-layer growth mode could be accomplished. Electrical conductivity (sigma) and Seebeck coefficient (S) were measured at room temperature for the composition-spread films grown at the optimized temperature and found to be considerably higher than those reported for bulk poly-crystalline compounds. Hall measurement revealed that carrier density linearly increased with increasing x, suggesting that a trivalent Ce ions substituted divalent Sr ions to supply electrons. A maximum power factor (S-2 sigma) was obtained for the x = 0.2 film, being 7 and 14 mu W/K-2 cm at 300 and 900 K, respectively.

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