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Anomaly of Thermal Properties in Thin Films of La1-xSrxCoO3 Series Synthesized with a Combinatorial Processing

Published online by Cambridge University Press:  17 March 2011

Yoshiaki Takata ,
Yutaka Adachi ,
Hajime Haneda ,
Yoshiki Wada ,
Makoto Ohtani ,
Tomoteru Fukumura ,
Masashi Kawasaki  and
Hideomi Koinuma
Yoshiaki Takata
Affiliation:
Combinatorial Materials Exploration and Technology (COMET), Namiki, Tsukuba, 305-0044, Japan.
Yutaka Adachi
Affiliation:
Takefumi Mitsuhashi Advanced Materials Laboratory, National Institute for Materials Science, Namiki, Tsukuba, 305-0044, Japan.
Hajime Haneda
Affiliation:
Combinatorial Materials Exploration and Technology (COMET), Namiki, Tsukuba, 305-0044, Japan.
Yoshiki Wada
Affiliation:
Takefumi Mitsuhashi Advanced Materials Laboratory, National Institute for Materials Science, Namiki, Tsukuba, 305-0044, Japan.
Makoto Ohtani
Affiliation:
Innovative and Engineered Materials, Tokyo Institute of Technology, Midori-ku, Yokohama, 226-8503, Japan.
Tomoteru Fukumura
Affiliation:
Institute for Materials Research, Tohoku University, Aoba-ku, Sendai, 980-8577, Japan.
Masashi Kawasaki
Affiliation:
Combinatorial Materials Exploration and Technology (COMET), Namiki, Tsukuba, 305-0044, Japan.
Hideomi Koinuma
Affiliation:
Frontier Collaborative Research Center, Tokyo Institute of Technology, Midori-ku, Yokohama, 226-8503, Japan.
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Abstract

The thermal diffusivities throughout a composition-spread film comprising La1- xSrxCoO3 series were determined by Transient Reflecting Grating (TRG) measurements. Thermal diffusivities of transparent SrCoO3 film and SrTiO3 substrate were determined by using third harmonics having wavelength of 266 nm as an excitation light with only a certain length of grating spacing. The thermal diffusivities of them were 0.02 and 0.05 cm2/s, respectively. With regard to untransparent thin films, the experiment was performed by setting three kinds of grating spacing for the excitation light having the fundamental wavelength, 800 nm in order to obtain high precision. The distribution profile of obtained values of the thermal diffusivity throughout the sample was traced as 0.06 - 0.18 - 0.01 cm2/s corresponding to the variation of in La1-xSrxCoO3, thus showing a convex profile, however, this anomalous profile was verified by comparing with the data obtained by the X-ray diffractometer.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 700: Symposium S – Combinatorial and Artificial Intelligence Methods in Materials Science , 2001 , S5.2
Copyright
Copyright © Materials Research Society 2002

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References

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