Combinatorial pulsed laser deposition and thermoelectricity of (La1−xCax)VO3 composition-spread films |
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| Authors: | Quinjiao Wang Kenji Itaka Hideki Minami Hitoshi Kawaji Hideomi Koinuma |
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| Affiliation: | a Materials and Structures Laboratory, Tokyo Institute of Technology, 4259, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan;b CREST-Japan Science and Technology Agency, Tsukuba, 305-0044, Japan;c Combinatorial Materials Exploration and Technology (COMET), Tsukuba, 305-0044, Japan |
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| Abstract: | La1−xCaxVO3 composition-spread film library was fabricated by combinatorial pulsed laser deposition and their thermoelectric properties were evaluated paralelly by the multi-channel probes of Seebeck coefficient and electric conductivity. Concurrent X-ray analysis verified the formation of solid soluted films in the full composition range (0x1) as judged from the linear variation of the lattice constants. The Seebeck coefficients of La1−xCaxVO3 changed from a large negative value to almost zero with the increase of x, due presumably to the variation of valence in vanadium ions.The power factor in this library was as high as 0.6 μW/cm K2, which was obtained at x=0, i.e. pure LaVO3 grown at 800 °C. |
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| Keywords: | Thermoelectric Seebeck coefficient Vanadium oxide Combinatorial technology Perovskite Pulsed laser deposition Composition-spread film |
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