Thermoelectric properties of LaFeAsO1-y at low temperature

被引：9
作者：
Kihou, K. [1 ,2 ]
Lee, C. H. [1 ,2 ]
Miyazawa, K. [1 ,3 ]
Shirage, P. M. [1 ,2 ]
Iyo, A. [1 ,2 ,3 ]
Eisaki, H. [1 ,2 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan
[2] JST, Transformat Res Project Iron Pnictides TRIP, Chiyoda Ku, Tokyo 1020075, Japan
[3] Tokyo Univ Sci, Dept Appl Elect, Chiba 2783510, Japan
来源：
JOURNAL OF APPLIED PHYSICS | 2010年 / 108卷 / 03期
关键词：
D O I：
10.1063/1.3466990
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have studied the thermoelectric properties of LaFeAsO1-y in the temperature range 10-300 K. The resistivity decreases with carrier doping induced by oxygen deficiency up to y=0.16. On the other hand, the Seebeck coefficient shows a maximum absolute value at a finite doping level. The power factor (PF) and the dimensionless thermoelectric figure of merit (ZT) in y=0.16 are PF=4.1 mW m(-1) K-2 at T=75 K and ZT=0.061 at T=125 K. The results indicate that iron pnictides have potential as a good low temperature thermoelectric material. (C) 2010 American Institute of Physics. [doi:10.1063/1.3466990]
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