TY - JOUR
T1 - Thermal stability of giant thermoelectric
T2 - Seebeck coefficient for SrTiO3SrTi0.8Nb0.2O3 Superlattices at 900 K
AU - Lee, Kyu Hyoung
AU - Mune, Yoriko
AU - Ohta, Hiromichi
AU - Koumoto, Kunihito
PY - 2008/1
Y1 - 2008/1
N2 - Herein we report the carrier transport properties of [(SrTiO 3)x/(SrTi0.8Nb0.2O3) 1]20 (× = 0-50) superlattices at high temperatures (T = 300-900 K). Significant structural changes were not observed in the superlattices after annealing at 900 K in a vacuum. The Seebeck coefficient of the [(SrTiO3)20/SrTi0.8Nb0.2O 3)1]20 superlattice, which was 300μV.K -1 at room temperature, gradually increased with temperature and reached 450μV-K-1 at 900 K, which is ~3 times larger than that of bulk SrTi0.8Nb0.2O3. These observations provide clear evidence that the superlattice is stable and exhibits a giant Seebeck coefficient even at high temperature.
AB - Herein we report the carrier transport properties of [(SrTiO 3)x/(SrTi0.8Nb0.2O3) 1]20 (× = 0-50) superlattices at high temperatures (T = 300-900 K). Significant structural changes were not observed in the superlattices after annealing at 900 K in a vacuum. The Seebeck coefficient of the [(SrTiO3)20/SrTi0.8Nb0.2O 3)1]20 superlattice, which was 300μV.K -1 at room temperature, gradually increased with temperature and reached 450μV-K-1 at 900 K, which is ~3 times larger than that of bulk SrTi0.8Nb0.2O3. These observations provide clear evidence that the superlattice is stable and exhibits a giant Seebeck coefficient even at high temperature.
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U2 - 10.1143/APEX.1.015007
DO - 10.1143/APEX.1.015007
M3 - Article
AN - SCOPUS:57049149691
SN - 1882-0778
VL - 1
JO - Applied Physics Express
JF - Applied Physics Express
IS - 1
M1 - 015007
ER -