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Anomaly of Thermal Properties in Thin Films of La1-x SrxCoO3 Series Fabricated as Thermoelectric Materials

Published online by Cambridge University Press:  01 February 2011

Yoshiaki Takata ,
Hajime Haneda ,
Yutaka Adachi ,
Yoshiki Wada ,
Takefumi Mitsuhashi ,
Makoto Ohtani ,
Tomoteru Fukumura ,
Masashi Kawasaki  and
Hideomi Koinuma
Yoshiaki Takata
Affiliation:
Combinatorial Materials Exploration and Technology (COMET), Namiki, Tsukuba, 3050044, Japan. Advanced Materials Laboratory, National Institute for Materials Science, Namiki, Tsukuba, 3050044, Japan.
Hajime Haneda
Affiliation:
Combinatorial Materials Exploration and Technology (COMET), Namiki, Tsukuba, 3050044, Japan. Advanced Materials Laboratory, National Institute for Materials Science, Namiki, Tsukuba, 3050044, Japan.
Yutaka Adachi
Affiliation:
Advanced Materials Laboratory, National Institute for Materials Science, Namiki, Tsukuba, 3050044, Japan.
Yoshiki Wada
Affiliation:
Advanced Materials Laboratory, National Institute for Materials Science, Namiki, Tsukuba, 3050044, Japan.
Takefumi Mitsuhashi
Affiliation:
Advanced Materials Laboratory, National Institute for Materials Science, Namiki, Tsukuba, 3050044, Japan.
Makoto Ohtani
Affiliation:
Innovative and Engineered Materials, Tokyo Institute of Technology, Midori-ku, Yokohama, 2268503, Japan.
Tomoteru Fukumura
Affiliation:
Combinatorial Materials Exploration and Technology (COMET), Namiki, Tsukuba, 3050044, Japan. Institute for Materials Research, Tohoku University, Aoba-ku, Sendai, 9808577, Japan.
Masashi Kawasaki
Affiliation:
Combinatorial Materials Exploration and Technology (COMET), Namiki, Tsukuba, 3050044, Japan. Institute for Materials Research, Tohoku University, Aoba-ku, Sendai, 9808577, Japan.
Hideomi Koinuma
Affiliation:
Combinatorial Materials Exploration and Technology (COMET), Namiki, Tsukuba, 3050044, Japan. Frontier Collaborative Research Center, Tokyo Institute of Technology, Midori-ku, Yokohama, 2268503, Japan.
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Abstract

Composition spreads of La1-xSrxCoO3 (LSCO) were synthesized as thermo-electric transducer material by means of combinatorial material synthesis, and information on their thermal diffusivity throughout the specimens was obtained. Meanwhile, it is anticipated that the composition spreads of LSCO have a variety of characteristic properties of light absorption corresponding to their composition, namely their compositional variable, x. Hence, we used transient optical pump-and-probe techniques in a reflection geometry to measure thermal diffusion times on LSCO. The results of signal analysis indicate that LSCO is a peculiar synthesized substance whose apparent thermal diffusivity, 1/ι, changes abruptly at the critical point, where the compositional variable x is equal to 0.3.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 730: Symposium V – Materials for Energy Storage, Generation, and Transport , 2002 , V8.1
Copyright
Copyright © Materials Research Society 2002

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References

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