TY - JOUR
T1 - Influence of excess SrO on the thermoelectric properties of heavily doped SrTiO3 ceramics
AU - Wang, Yifeng
AU - Wan, Chunlei
AU - Zhang, Xiaoyan
AU - Shen, Liming
AU - Koumoto, Kunihito
AU - Gupta, Arunava
AU - Bao, Ningzhong
PY - 2013/5/6
Y1 - 2013/5/6
N2 - The effects of excess SrO on the thermoelectric properties of n-type SrTiO3 have been investigated through a comparative study of different polycrystalline ceramic samples. These include Gd-doped SrTiO 3 with varying SrO, nominally in the form of Ruddlesden-Popper phase of SrO(SrTiO3)n with n 5, 10, and 20, and previously reported analogues with n 1, 2, and (i.e., stoichiometric SrTiO3). As compared with stoichiometric SrTiO3, with increasing SrO excess (i.e., decreasing n value), the electrical conductivity is found to decrease more substantially than the thermal conductivity, while the Seebeck coefficient remains almost unaffected with n in the range of 5-20.
AB - The effects of excess SrO on the thermoelectric properties of n-type SrTiO3 have been investigated through a comparative study of different polycrystalline ceramic samples. These include Gd-doped SrTiO 3 with varying SrO, nominally in the form of Ruddlesden-Popper phase of SrO(SrTiO3)n with n 5, 10, and 20, and previously reported analogues with n 1, 2, and (i.e., stoichiometric SrTiO3). As compared with stoichiometric SrTiO3, with increasing SrO excess (i.e., decreasing n value), the electrical conductivity is found to decrease more substantially than the thermal conductivity, while the Seebeck coefficient remains almost unaffected with n in the range of 5-20.
UR - http://www.scopus.com/inward/record.url?scp=84877782480&partnerID=8YFLogxK
U2 - 10.1063/1.4804372
DO - 10.1063/1.4804372
M3 - 文章
AN - SCOPUS:84877782480
SN - 0003-6951
VL - 102
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 18
M1 - 183905
ER -