Thermoelectric Properties of Layered Pd Oxide R_2PdO_4 (R=La, Nd, Sm, and Gd)(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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We prepared polycrystalline samples of R_2PdO_4 (R=La, Nd, Sm, and Gd) using a NaCl flux technique. The measured resistivity is of the order of 10^3-10^4 Ωcm at room temperature, which is two orders of magnitude smaller than those reported so far. We also studied the substitution effects of Ce for Nd in Nd_<1.9>Ce_<0.1>PdO_4, where the substituted Ce decreases resistivity and the magnitude of thermopower. Activation energy gap of 70-80 meV and an effective mass of 15 evaluated from the measured data are suitable for thermoelectric materials, but a mobility of 10^<-6>cm^2/(V・s) is much lower than typical mobilities of 1-10cm^2/(V・s) for other thermoelectric oxides.
- 社団法人日本物理学会の論文
- 2006-02-15
著者
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TERASAKI Ichiro
Department of Applied Physics, Waseda University
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Terasaki Ichiro
Department Of Applied Physics Waseda University:crest Japan Science And Technology Agency
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Terasaki Ichiro
Department Of Applied Physics The University Of Tokyo
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SHIBASAKI Soichiro
Department of Applied Physics, Waseda University
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TERASAKI Ichiro
Department of Applied Physics, Waseda University:CREST, Japan Science and Technology Agency
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