THERMOELECTRIC PROPERTIES OF Y-DOPED POLYCRYSTALLINE SrTiO3

THERMOELECTRIC PROPERTIES OF Y-DOPED POLYCRYSTALLINE SrTiO3

The thermoelectric properties of Y-doped polycrystalline SrTiO3 (Sr1-xYxTiO3) are measured from 10 K to 900 K. The Y component is doped up to the solubility limit of Sr1-xYxTiO3, x=0.1. The Y-doped polycrystalline samples show a low resistivity, approximately equals 1x10-5 OHM*m and a large absolute...

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Published in:Jpn.J.Appl.Phys ,Part 2. Vol. 43, no. 4B, pp. L540-L542. 2004 Vol. 43; no. 4B; pp. L540 - L542
Main Authors: Obara, H, Yamamoto, A, Lee, C-H, Kobayashi, K, Matsumoto, A, Funahashi, R
Format: Journal Article
Language:English
Published: 15-04-2004
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Summary:The thermoelectric properties of Y-doped polycrystalline SrTiO3 (Sr1-xYxTiO3) are measured from 10 K to 900 K. The Y component is doped up to the solubility limit of Sr1-xYxTiO3, x=0.1. The Y-doped polycrystalline samples show a low resistivity, approximately equals 1x10-5 OHM*m and a large absolute value of the Seebeck coefficient, approximately equals 150 mu V/K, at room temperature. Consequently, they have a high power factor, 1.2x10-3 W/mK2, defined as PF=S2/r, where S is the Seebeck coefficient and r is the resistivity. Furthermore, authors observe a decrease in the thermal conductivity of SrTiO3 due to phonon scattering by the Y dopant. 15 refs.
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ISSN:0021-4922
DOI:10.1143/JJAP.43.L540